perf tests: Fixup return path of open-syscall-tp-fields test case
[linux-3.10.git] / tools / perf / tests / open-syscall-tp-fields.c
1 #include "perf.h"
2 #include "evlist.h"
3 #include "evsel.h"
4 #include "thread_map.h"
5 #include "tests.h"
6
7 int test__syscall_open_tp_fields(void)
8 {
9         struct perf_record_opts opts = {
10                 .target = {
11                         .uid = UINT_MAX,
12                         .uses_mmap = true,
13                 },
14                 .no_delay   = true,
15                 .freq       = 1,
16                 .mmap_pages = 256,
17                 .raw_samples = true,
18         };
19         const char *filename = "/etc/passwd";
20         int flags = O_RDONLY | O_DIRECTORY;
21         struct perf_evlist *evlist = perf_evlist__new();
22         struct perf_evsel *evsel;
23         int err = -1, i, nr_events = 0, nr_polls = 0;
24
25         if (evlist == NULL) {
26                 pr_debug("%s: perf_evlist__new\n", __func__);
27                 goto out;
28         }
29
30         evsel = perf_evsel__newtp("syscalls", "sys_enter_open", 0);
31         if (evsel == NULL) {
32                 pr_debug("%s: perf_evsel__newtp\n", __func__);
33                 goto out_delete_evlist;
34         }
35
36         perf_evlist__add(evlist, evsel);
37
38         err = perf_evlist__create_maps(evlist, &opts.target);
39         if (err < 0) {
40                 pr_debug("%s: perf_evlist__create_maps\n", __func__);
41                 goto out_delete_evlist;
42         }
43
44         perf_evsel__config(evsel, &opts);
45
46         evlist->threads->map[0] = getpid();
47
48         err = perf_evlist__open(evlist);
49         if (err < 0) {
50                 pr_debug("perf_evlist__open: %s\n", strerror(errno));
51                 goto out_delete_maps;
52         }
53
54         err = perf_evlist__mmap(evlist, UINT_MAX, false);
55         if (err < 0) {
56                 pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
57                 goto out_close_evlist;
58         }
59
60         perf_evlist__enable(evlist);
61
62         /*
63          * Generate the event:
64          */
65         open(filename, flags);
66
67         while (1) {
68                 int before = nr_events;
69
70                 for (i = 0; i < evlist->nr_mmaps; i++) {
71                         union perf_event *event;
72
73                         while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
74                                 const u32 type = event->header.type;
75                                 int tp_flags;
76                                 struct perf_sample sample;
77
78                                 ++nr_events;
79
80                                 if (type != PERF_RECORD_SAMPLE)
81                                         continue;
82
83                                 err = perf_evsel__parse_sample(evsel, event, &sample);
84                                 if (err) {
85                                         pr_err("Can't parse sample, err = %d\n", err);
86                                         goto out_munmap;
87                                 }
88
89                                 tp_flags = perf_evsel__intval(evsel, &sample, "flags");
90
91                                 if (flags != tp_flags) {
92                                         pr_debug("%s: Expected flags=%#x, got %#x\n",
93                                                  __func__, flags, tp_flags);
94                                         goto out_munmap;
95                                 }
96
97                                 goto out_ok;
98                         }
99                 }
100
101                 if (nr_events == before)
102                         poll(evlist->pollfd, evlist->nr_fds, 10);
103
104                 if (++nr_polls > 5) {
105                         pr_debug("%s: no events!\n", __func__);
106                         goto out_munmap;
107                 }
108         }
109 out_ok:
110         err = 0;
111 out_munmap:
112         perf_evlist__munmap(evlist);
113 out_close_evlist:
114         perf_evlist__close(evlist);
115 out_delete_maps:
116         perf_evlist__delete_maps(evlist);
117 out_delete_evlist:
118         perf_evlist__delete(evlist);
119 out:
120         return err;
121 }