1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
// SPDX-License-Identifier: GPL-2.0
#include <stdbool.h>
#include <linux/err.h>
#include <linux/string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "evlist.h"
#include "evsel.h"
#include "thread_map.h"
#include "record.h"
#include "tests.h"
#include "debug.h"
#include "util/mmap.h"
#include <errno.h>
#include <perf/mmap.h>
#ifndef O_DIRECTORY
#define O_DIRECTORY 00200000
#endif
#ifndef AT_FDCWD
#define AT_FDCWD -100
#endif
static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
struct record_opts opts = {
.target = {
.uid = UINT_MAX,
.uses_mmap = true,
},
.no_buffering = true,
.freq = 1,
.mmap_pages = 256,
.raw_samples = true,
};
const char *filename = "/etc/passwd";
int flags = O_RDONLY | O_DIRECTORY;
struct evlist *evlist = evlist__new();
struct evsel *evsel;
int err = -1, i, nr_events = 0, nr_polls = 0;
char sbuf[STRERR_BUFSIZE];
if (evlist == NULL) {
pr_debug("%s: evlist__new\n", __func__);
goto out;
}
evsel = evsel__newtp("syscalls", "sys_enter_openat");
if (IS_ERR(evsel)) {
pr_debug("%s: evsel__newtp\n", __func__);
goto out_delete_evlist;
}
evlist__add(evlist, evsel);
err = evlist__create_maps(evlist, &opts.target);
if (err < 0) {
pr_debug("%s: evlist__create_maps\n", __func__);
goto out_delete_evlist;
}
evsel__config(evsel, &opts, NULL);
perf_thread_map__set_pid(evlist->core.threads, 0, getpid());
err = evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n",
str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}
err = evlist__mmap(evlist, UINT_MAX);
if (err < 0) {
pr_debug("evlist__mmap: %s\n",
str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}
evlist__enable(evlist);
/*
* Generate the event:
*/
openat(AT_FDCWD, filename, flags);
while (1) {
int before = nr_events;
for (i = 0; i < evlist->core.nr_mmaps; i++) {
union perf_event *event;
struct mmap *md;
md = &evlist->mmap[i];
if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(&md->core)) != NULL) {
const u32 type = event->header.type;
int tp_flags;
struct perf_sample sample;
++nr_events;
if (type != PERF_RECORD_SAMPLE) {
perf_mmap__consume(&md->core);
continue;
}
err = evsel__parse_sample(evsel, event, &sample);
if (err) {
pr_debug("Can't parse sample, err = %d\n", err);
goto out_delete_evlist;
}
tp_flags = evsel__intval(evsel, &sample, "flags");
if (flags != tp_flags) {
pr_debug("%s: Expected flags=%#x, got %#x\n",
__func__, flags, tp_flags);
goto out_delete_evlist;
}
goto out_ok;
}
perf_mmap__read_done(&md->core);
}
if (nr_events == before)
evlist__poll(evlist, 10);
if (++nr_polls > 5) {
pr_debug("%s: no events!\n", __func__);
goto out_delete_evlist;
}
}
out_ok:
err = 0;
out_delete_evlist:
evlist__delete(evlist);
out:
return err;
}
DEFINE_SUITE("syscalls:sys_enter_openat event fields", syscall_openat_tp_fields);
|
