projects/linux·blob master · refs

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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
26static 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 .uses_mmap = true,
32 },
33 .no_buffering = true,
34 .freq = 1,
35 .mmap_pages = 256,
36 .raw_samples = true,
37 };
38 const char *filename = "/etc/passwd";
39 int flags = O_RDONLY | O_DIRECTORY;
40 struct evlist *evlist = evlist__new();
41 struct evsel *evsel;
42 int ret = TEST_FAIL, err, i, nr_events = 0, nr_polls = 0;
43 char sbuf[STRERR_BUFSIZE];
44
45 if (evlist == NULL) {
46 pr_debug("%s: evlist__new\n", __func__);
47 goto out;
48 }
49
50 evsel = evsel__newtp("syscalls", "sys_enter_openat");
51 if (IS_ERR(evsel)) {
52 pr_debug("%s: evsel__newtp\n", __func__);
53 ret = PTR_ERR(evsel) == -EACCES ? TEST_SKIP : TEST_FAIL;
54 goto out_put_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_put_evlist;
63 }
64
65 evsel__config(evsel, &opts, NULL);
66
67 perf_thread_map__set_pid(evlist__core(evlist)->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_put_evlist;
74 }
75
76 err = evlist__do_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_put_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(evlist)->nr_mmaps; i++) {
94 union perf_event *event;
95 struct mmap *md;
96
97 md = &evlist__mmap(evlist)[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 perf_sample__init(&sample, /*all=*/false);
114 err = evsel__parse_sample(evsel, event, &sample);
115 if (err) {
116 pr_debug("Can't parse sample, err = %d\n", err);
117 perf_sample__exit(&sample);
118 goto out_put_evlist;
119 }
120
121 tp_flags = perf_sample__intval(&sample, "flags");
122 perf_sample__exit(&sample);
123 /* C library wrapper may set additional flags,
124 access mode must be unchanged */
125 if ((tp_flags & O_ACCMODE) != (flags & O_ACCMODE) ||
126 (tp_flags & flags) != flags) {
127 pr_debug("%s: Expected flags=%#x, got %#x\n",
128 __func__, flags, tp_flags);
129 goto out_put_evlist;
130 }
131
132 goto out_ok;
133 }
134 perf_mmap__read_done(&md->core);
135 }
136
137 if (nr_events == before)
138 evlist__poll(evlist, 10);
139
140 if (++nr_polls > 5) {
141 pr_debug("%s: no events!\n", __func__);
142 goto out_put_evlist;
143 }
144 }
145out_ok:
146 ret = TEST_OK;
147out_put_evlist:
148 evlist__put(evlist);
149out:
150 return ret;
151}
152
153static struct test_case tests__syscall_openat_tp_fields[] = {
154 TEST_CASE_REASON("syscalls:sys_enter_openat event fields",
155 syscall_openat_tp_fields,
156 "permissions"),
157 { .name = NULL, }
158};
159
160struct test_suite suite__syscall_openat_tp_fields = {
161 .desc = "syscalls:sys_enter_openat event fields",
162 .test_cases = tests__syscall_openat_tp_fields,
163};