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(ptr: 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 | |