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