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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/err.h>
3#include <sys/types.h>
4#include <sys/stat.h>
5#include <fcntl.h>
6#include "perf.h"
7#include "evlist.h"
8#include "evsel.h"
9#include "thread_map.h"
10#include "tests.h"
11#include "debug.h"
12#include <errno.h>
13
14#ifndef O_DIRECTORY
15#define O_DIRECTORY 00200000
16#endif
17#ifndef AT_FDCWD
18#define AT_FDCWD -100
19#endif
20
21int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest __maybe_unused)
22{
23 struct record_opts opts = {
24 .target = {
25 .uid = UINT_MAX,
26 .uses_mmap = true,
27 },
28 .no_buffering = true,
29 .freq = 1,
30 .mmap_pages = 256,
31 .raw_samples = true,
32 };
33 const char *filename = "/etc/passwd";
34 int flags = O_RDONLY | O_DIRECTORY;
35 struct perf_evlist *evlist = perf_evlist__new();
36 struct perf_evsel *evsel;
37 int err = -1, i, nr_events = 0, nr_polls = 0;
38 char sbuf[STRERR_BUFSIZE];
39
40 if (evlist == NULL) {
41 pr_debug("%s: perf_evlist__new\n", __func__);
42 goto out;
43 }
44
45 evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
46 if (IS_ERR(evsel)) {
47 pr_debug("%s: perf_evsel__newtp\n", __func__);
48 goto out_delete_evlist;
49 }
50
51 perf_evlist__add(evlist, evsel);
52
53 err = perf_evlist__create_maps(evlist, &opts.target);
54 if (err < 0) {
55 pr_debug("%s: perf_evlist__create_maps\n", __func__);
56 goto out_delete_evlist;
57 }
58
59 perf_evsel__config(evsel, &opts, NULL);
60
61 thread_map__set_pid(evlist->threads, 0, getpid());
62
63 err = perf_evlist__open(evlist);
64 if (err < 0) {
65 pr_debug("perf_evlist__open: %s\n",
66 str_error_r(errno, sbuf, sizeof(sbuf)));
67 goto out_delete_evlist;
68 }
69
70 err = perf_evlist__mmap(evlist, UINT_MAX);
71 if (err < 0) {
72 pr_debug("perf_evlist__mmap: %s\n",
73 str_error_r(errno, sbuf, sizeof(sbuf)));
74 goto out_delete_evlist;
75 }
76
77 perf_evlist__enable(evlist);
78
79 /*
80 * Generate the event:
81 */
82 openat(AT_FDCWD, filename, flags);
83
84 while (1) {
85 int before = nr_events;
86
87 for (i = 0; i < evlist->nr_mmaps; i++) {
88 union perf_event *event;
89
90 while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
91 const u32 type = event->header.type;
92 int tp_flags;
93 struct perf_sample sample;
94
95 ++nr_events;
96
97 if (type != PERF_RECORD_SAMPLE) {
98 perf_evlist__mmap_consume(evlist, i);
99 continue;
100 }
101
102 err = perf_evsel__parse_sample(evsel, event, &sample);
103 if (err) {
104 pr_debug("Can't parse sample, err = %d\n", err);
105 goto out_delete_evlist;
106 }
107
108 tp_flags = perf_evsel__intval(evsel, &sample, "flags");
109
110 if (flags != tp_flags) {
111 pr_debug("%s: Expected flags=%#x, got %#x\n",
112 __func__, flags, tp_flags);
113 goto out_delete_evlist;
114 }
115
116 goto out_ok;
117 }
118 }
119
120 if (nr_events == before)
121 perf_evlist__poll(evlist, 10);
122
123 if (++nr_polls > 5) {
124 pr_debug("%s: no events!\n", __func__);
125 goto out_delete_evlist;
126 }
127 }
128out_ok:
129 err = 0;
130out_delete_evlist:
131 perf_evlist__delete(evlist);
132out:
133 return err;
134}