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 
process_event(struct evlist ** pevlist,union perf_event * event)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 (evlist__parse_sample(*pevlist, event, &sample)) {
31 		pr_debug("evlist__parse_sample failed\n");
32 		return -1;
33 	}
34 
35 	return 0;
36 }
37 
process_events(union perf_event ** events,size_t count)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  */
test__parse_no_sample_id_all(struct test_suite * test __maybe_unused,int subtest __maybe_unused)70 static int test__parse_no_sample_id_all(struct test_suite *test __maybe_unused,
71 					int subtest __maybe_unused)
72 {
73 	int err;
74 
75 	struct test_attr_event event1 = {
76 		.header = {
77 			.type = PERF_RECORD_HEADER_ATTR,
78 			.size = sizeof(struct test_attr_event),
79 		},
80 		.id = 1,
81 	};
82 	struct test_attr_event event2 = {
83 		.header = {
84 			.type = PERF_RECORD_HEADER_ATTR,
85 			.size = sizeof(struct test_attr_event),
86 		},
87 		.id = 2,
88 	};
89 	struct perf_record_mmap event3 = {
90 		.header = {
91 			.type = PERF_RECORD_MMAP,
92 			.size = sizeof(struct perf_record_mmap),
93 		},
94 	};
95 	union perf_event *events[] = {
96 		(union perf_event *)&event1,
97 		(union perf_event *)&event2,
98 		(union perf_event *)&event3,
99 	};
100 
101 	err = process_events(events, ARRAY_SIZE(events));
102 	if (err)
103 		return -1;
104 
105 	return 0;
106 }
107 
108 DEFINE_SUITE("Parse with no sample_id_all bit set", parse_no_sample_id_all);
109