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
test__syscall_openat_tp_fields(struct test * test __maybe_unused,int subtest __maybe_unused)21 int 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 struct perf_mmap *md;
90
91 md = &evlist->mmap[i];
92 if (perf_mmap__read_init(md) < 0)
93 continue;
94
95 while ((event = perf_mmap__read_event(md)) != NULL) {
96 const u32 type = event->header.type;
97 int tp_flags;
98 struct perf_sample sample;
99
100 ++nr_events;
101
102 if (type != PERF_RECORD_SAMPLE) {
103 perf_mmap__consume(md);
104 continue;
105 }
106
107 err = perf_evsel__parse_sample(evsel, event, &sample);
108 if (err) {
109 pr_debug("Can't parse sample, err = %d\n", err);
110 goto out_delete_evlist;
111 }
112
113 tp_flags = perf_evsel__intval(evsel, &sample, "flags");
114
115 if (flags != tp_flags) {
116 pr_debug("%s: Expected flags=%#x, got %#x\n",
117 __func__, flags, tp_flags);
118 goto out_delete_evlist;
119 }
120
121 goto out_ok;
122 }
123 perf_mmap__read_done(md);
124 }
125
126 if (nr_events == before)
127 perf_evlist__poll(evlist, 10);
128
129 if (++nr_polls > 5) {
130 pr_debug("%s: no events!\n", __func__);
131 goto out_delete_evlist;
132 }
133 }
134 out_ok:
135 err = 0;
136 out_delete_evlist:
137 perf_evlist__delete(evlist);
138 out:
139 return err;
140 }
141