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 record_opts opts = {
  10                 .target = {
  11                         .uid = UINT_MAX,
  12                         .uses_mmap = true,
  13                 },
  14                 .no_buffering = 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");
  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_evlist;
  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_delete_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                                         perf_evlist__mmap_consume(evlist, i);
  82                                         continue;
  83                                 }
  84
  85                                 err = perf_evsel__parse_sample(evsel, event, &sample);
  86                                 if (err) {
  87                                         pr_err("Can't parse sample, err = %d\n", err);
  88                                         goto out_delete_evlist;
  89                                 }
  90
  91                                 tp_flags = perf_evsel__intval(evsel, &sample, "flags");
  92
  93                                 if (flags != tp_flags) {
  94                                         pr_debug("%s: Expected flags=%#x, got %#x\n",
  95                                                  __func__, flags, tp_flags);
  96                                         goto out_delete_evlist;
  97                                 }
  98
  99                                 goto out_ok;
 100                         }
 101                 }
 102
 103                 if (nr_events == before)
 104                         poll(evlist->pollfd, evlist->nr_fds, 10);
 105
 106                 if (++nr_polls > 5) {
 107                         pr_debug("%s: no events!\n", __func__);
 108                         goto out_delete_evlist;
 109                 }
 110         }
 111 out_ok:
 112         err = 0;
 113 out_delete_evlist:
 114         perf_evlist__delete(evlist);
 115 out:
 116         return err;
 117 }