1#include <linux/err.h>
2#include "perf.h"
3#include "evlist.h"
4#include "evsel.h"
5#include "thread_map.h"
6#include "tests.h"
7#include "debug.h"
8
9int test__syscall_openat_tp_fields(void)
10{
11	struct record_opts opts = {
12		.target = {
13			.uid = UINT_MAX,
14			.uses_mmap = true,
15		},
16		.no_buffering = true,
17		.freq	      = 1,
18		.mmap_pages   = 256,
19		.raw_samples  = true,
20	};
21	const char *filename = "/etc/passwd";
22	int flags = O_RDONLY | O_DIRECTORY;
23	struct perf_evlist *evlist = perf_evlist__new();
24	struct perf_evsel *evsel;
25	int err = -1, i, nr_events = 0, nr_polls = 0;
26	char sbuf[STRERR_BUFSIZE];
27
28	if (evlist == NULL) {
29		pr_debug("%s: perf_evlist__new\n", __func__);
30		goto out;
31	}
32
33	evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
34	if (IS_ERR(evsel)) {
35		pr_debug("%s: perf_evsel__newtp\n", __func__);
36		goto out_delete_evlist;
37	}
38
39	perf_evlist__add(evlist, evsel);
40
41	err = perf_evlist__create_maps(evlist, &opts.target);
42	if (err < 0) {
43		pr_debug("%s: perf_evlist__create_maps\n", __func__);
44		goto out_delete_evlist;
45	}
46
47	perf_evsel__config(evsel, &opts);
48
49	thread_map__set_pid(evlist->threads, 0, getpid());
50
51	err = perf_evlist__open(evlist);
52	if (err < 0) {
53		pr_debug("perf_evlist__open: %s\n",
54			 strerror_r(errno, sbuf, sizeof(sbuf)));
55		goto out_delete_evlist;
56	}
57
58	err = perf_evlist__mmap(evlist, UINT_MAX, false);
59	if (err < 0) {
60		pr_debug("perf_evlist__mmap: %s\n",
61			 strerror_r(errno, sbuf, sizeof(sbuf)));
62		goto out_delete_evlist;
63	}
64
65	perf_evlist__enable(evlist);
66
67	/*
68	 * Generate the event:
69	 */
70	openat(AT_FDCWD, filename, flags);
71
72	while (1) {
73		int before = nr_events;
74
75		for (i = 0; i < evlist->nr_mmaps; i++) {
76			union perf_event *event;
77
78			while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
79				const u32 type = event->header.type;
80				int tp_flags;
81				struct perf_sample sample;
82
83				++nr_events;
84
85				if (type != PERF_RECORD_SAMPLE) {
86					perf_evlist__mmap_consume(evlist, i);
87					continue;
88				}
89
90				err = perf_evsel__parse_sample(evsel, event, &sample);
91				if (err) {
92					pr_debug("Can't parse sample, err = %d\n", err);
93					goto out_delete_evlist;
94				}
95
96				tp_flags = perf_evsel__intval(evsel, &sample, "flags");
97
98				if (flags != tp_flags) {
99					pr_debug("%s: Expected flags=%#x, got %#x\n",
100						 __func__, flags, tp_flags);
101					goto out_delete_evlist;
102				}
103
104				goto out_ok;
105			}
106		}
107
108		if (nr_events == before)
109			perf_evlist__poll(evlist, 10);
110
111		if (++nr_polls > 5) {
112			pr_debug("%s: no events!\n", __func__);
113			goto out_delete_evlist;
114		}
115	}
116out_ok:
117	err = 0;
118out_delete_evlist:
119	perf_evlist__delete(evlist);
120out:
121	return err;
122}
123