1
2#include <stdbool.h>
3#include <linux/err.h>
4#include <linux/string.h>
5#include <sys/types.h>
6#include <sys/stat.h>
7#include <fcntl.h>
8#include "evlist.h"
9#include "evsel.h"
10#include "thread_map.h"
11#include "record.h"
12#include "tests.h"
13#include "debug.h"
14#include "util/mmap.h"
15#include <errno.h>
16#include <perf/mmap.h>
17
18#ifndef O_DIRECTORY
19#define O_DIRECTORY 00200000
20#endif
21#ifndef AT_FDCWD
22#define AT_FDCWD -100
23#endif
24
25int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest __maybe_unused)
26{
27 struct record_opts opts = {
28 .target = {
29 .uid = UINT_MAX,
30 .uses_mmap = true,
31 },
32 .no_buffering = true,
33 .freq = 1,
34 .mmap_pages = 256,
35 .raw_samples = true,
36 };
37 const char *filename = "/etc/passwd";
38 int flags = O_RDONLY | O_DIRECTORY;
39 struct evlist *evlist = evlist__new();
40 struct evsel *evsel;
41 int err = -1, i, nr_events = 0, nr_polls = 0;
42 char sbuf[STRERR_BUFSIZE];
43
44 if (evlist == NULL) {
45 pr_debug("%s: evlist__new\n", __func__);
46 goto out;
47 }
48
49 evsel = evsel__newtp("syscalls", "sys_enter_openat");
50 if (IS_ERR(evsel)) {
51 pr_debug("%s: evsel__newtp\n", __func__);
52 goto out_delete_evlist;
53 }
54
55 evlist__add(evlist, evsel);
56
57 err = evlist__create_maps(evlist, &opts.target);
58 if (err < 0) {
59 pr_debug("%s: evlist__create_maps\n", __func__);
60 goto out_delete_evlist;
61 }
62
63 evsel__config(evsel, &opts, NULL);
64
65 perf_thread_map__set_pid(evlist->core.threads, 0, getpid());
66
67 err = evlist__open(evlist);
68 if (err < 0) {
69 pr_debug("perf_evlist__open: %s\n",
70 str_error_r(errno, sbuf, sizeof(sbuf)));
71 goto out_delete_evlist;
72 }
73
74 err = evlist__mmap(evlist, UINT_MAX);
75 if (err < 0) {
76 pr_debug("evlist__mmap: %s\n",
77 str_error_r(errno, sbuf, sizeof(sbuf)));
78 goto out_delete_evlist;
79 }
80
81 evlist__enable(evlist);
82
83
84
85
86 openat(AT_FDCWD, filename, flags);
87
88 while (1) {
89 int before = nr_events;
90
91 for (i = 0; i < evlist->core.nr_mmaps; i++) {
92 union perf_event *event;
93 struct mmap *md;
94
95 md = &evlist->mmap[i];
96 if (perf_mmap__read_init(&md->core) < 0)
97 continue;
98
99 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
100 const u32 type = event->header.type;
101 int tp_flags;
102 struct perf_sample sample;
103
104 ++nr_events;
105
106 if (type != PERF_RECORD_SAMPLE) {
107 perf_mmap__consume(&md->core);
108 continue;
109 }
110
111 err = evsel__parse_sample(evsel, event, &sample);
112 if (err) {
113 pr_debug("Can't parse sample, err = %d\n", err);
114 goto out_delete_evlist;
115 }
116
117 tp_flags = evsel__intval(evsel, &sample, "flags");
118
119 if (flags != tp_flags) {
120 pr_debug("%s: Expected flags=%#x, got %#x\n",
121 __func__, flags, tp_flags);
122 goto out_delete_evlist;
123 }
124
125 goto out_ok;
126 }
127 perf_mmap__read_done(&md->core);
128 }
129
130 if (nr_events == before)
131 evlist__poll(evlist, 10);
132
133 if (++nr_polls > 5) {
134 pr_debug("%s: no events!\n", __func__);
135 goto out_delete_evlist;
136 }
137 }
138out_ok:
139 err = 0;
140out_delete_evlist:
141 evlist__delete(evlist);
142out:
143 return err;
144}
145
