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 
process_event(struct evlist ** pevlist,union perf_event * event)13 static int process_event(struct evlist **pevlist, union perf_event *event)
14 {
15 	struct perf_sample sample;
16 
17 	if (event->header.type == PERF_RECORD_HEADER_ATTR) {
18 		if (perf_event__process_attr(NULL, event, pevlist)) {
19 			pr_debug("perf_event__process_attr failed\n");
20 			return -1;
21 		}
22 		return 0;
23 	}
24 
25 	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
26 		return -1;
27 
28 	if (!*pevlist)
29 		return -1;
30 
31 	if (evlist__parse_sample(*pevlist, event, &sample)) {
32 		pr_debug("evlist__parse_sample failed\n");
33 		return -1;
34 	}
35 
36 	return 0;
37 }
38 
process_events(union perf_event ** events,size_t count)39 static int process_events(union perf_event **events, size_t count)
40 {
41 	struct evlist *evlist = NULL;
42 	int err = 0;
43 	size_t i;
44 
45 	for (i = 0; i < count && !err; i++)
46 		err = process_event(&evlist, events[i]);
47 
48 	evlist__delete(evlist);
49 
50 	return err;
51 }
52 
53 struct test_attr_event {
54 	struct perf_event_header header;
55 	struct perf_event_attr	 attr;
56 	u64 id;
57 };
58 
59 /**
60  * test__parse_no_sample_id_all - test parsing with no sample_id_all bit set.
61  *
62  * This function tests parsing data produced on kernel's that do not support the
63  * sample_id_all bit.  Without the sample_id_all bit, non-sample events (such as
64  * mmap events) do not have an id sample appended, and consequently logic
65  * designed to determine the id will not work.  That case happens when there is
66  * more than one selected event, so this test processes three events: 2
67  * attributes representing the selected events and one mmap event.
68  *
69  * Return: %0 on success, %-1 if the test fails.
70  */
test__parse_no_sample_id_all(struct test_suite * test __maybe_unused,int subtest __maybe_unused)71 static int test__parse_no_sample_id_all(struct test_suite *test __maybe_unused,
72 					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 perf_record_mmap event3 = {
91 		.header = {
92 			.type = PERF_RECORD_MMAP,
93 			.size = sizeof(struct perf_record_mmap),
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 
109 DEFINE_SUITE("Parse with no sample_id_all bit set", parse_no_sample_id_all);
110