1 // SPDX-License-Identifier: GPL-2.0
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 #include "util/sample.h"
18
19 #ifndef O_DIRECTORY
20 #define O_DIRECTORY 00200000
21 #endif
22 #ifndef AT_FDCWD
23 #define AT_FDCWD -100
24 #endif
25
26 static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused,
27 int subtest __maybe_unused)
28 {
29 struct record_opts opts = {
30 .target = {
31 .uid = UINT_MAX,
32 .uses_mmap = true,
33 },
34 .no_buffering = true,
35 .freq = 1,
36 .mmap_pages = 256,
37 .raw_samples = true,
38 };
39 const char *filename = "/etc/passwd";
40 int flags = O_RDONLY | O_DIRECTORY;
41 struct evlist *evlist = evlist__new();
42 struct evsel *evsel;
43 int err = -1, i, nr_events = 0, nr_polls = 0;
44 char sbuf[STRERR_BUFSIZE];
45
46 if (evlist == NULL) {
47 pr_debug("%s: evlist__new\n", __func__);
48 goto out;
49 }
50
51 evsel = evsel__newtp("syscalls", "sys_enter_openat");
52 if (IS_ERR(evsel)) {
53 pr_debug("%s: evsel__newtp\n", __func__);
54 goto out_delete_evlist;
55 }
56
57 evlist__add(evlist, evsel);
58
59 err = evlist__create_maps(evlist, &opts.target);
60 if (err < 0) {
61 pr_debug("%s: evlist__create_maps\n", __func__);
62 goto out_delete_evlist;
63 }
64
65 evsel__config(evsel, &opts, NULL);
66
67 perf_thread_map__set_pid(evlist->core.threads, 0, getpid());
68
69 err = evlist__open(evlist);
70 if (err < 0) {
71 pr_debug("perf_evlist__open: %s\n",
72 str_error_r(errno, sbuf, sizeof(sbuf)));
73 goto out_delete_evlist;
74 }
75
76 err = evlist__mmap(evlist, UINT_MAX);
77 if (err < 0) {
78 pr_debug("evlist__mmap: %s\n",
79 str_error_r(errno, sbuf, sizeof(sbuf)));
80 goto out_delete_evlist;
81 }
82
83 evlist__enable(evlist);
84
85 /*
86 * Generate the event:
87 */
88 openat(AT_FDCWD, filename, flags);
89
90 while (1) {
91 int before = nr_events;
92
93 for (i = 0; i < evlist->core.nr_mmaps; i++) {
94 union perf_event *event;
95 struct mmap *md;
96
97 md = &evlist->mmap[i];
98 if (perf_mmap__read_init(&md->core) < 0)
99 continue;
100
101 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
102 const u32 type = event->header.type;
103 int tp_flags;
104 struct perf_sample sample;
105
106 ++nr_events;
107
108 if (type != PERF_RECORD_SAMPLE) {
109 perf_mmap__consume(&md->core);
110 continue;
111 }
112
113 err = evsel__parse_sample(evsel, event, &sample);
114 if (err) {
115 pr_debug("Can't parse sample, err = %d\n", err);
116 goto out_delete_evlist;
117 }
118
119 tp_flags = evsel__intval(evsel, &sample, "flags");
120
121 if (flags != tp_flags) {
122 pr_debug("%s: Expected flags=%#x, got %#x\n",
123 __func__, flags, tp_flags);
124 goto out_delete_evlist;
125 }
126
127 goto out_ok;
128 }
129 perf_mmap__read_done(&md->core);
130 }
131
132 if (nr_events == before)
133 evlist__poll(evlist, 10);
134
135 if (++nr_polls > 5) {
136 pr_debug("%s: no events!\n", __func__);
137 goto out_delete_evlist;
138 }
139 }
140 out_ok:
141 err = 0;
142 out_delete_evlist:
143 evlist__delete(evlist);
144 out:
145 return err;
146 }
147
148 DEFINE_SUITE("syscalls:sys_enter_openat event fields", syscall_openat_tp_fields);
149
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