1 #include "thread_map.h"
6 int test__open_syscall_event(void)
9 struct thread_map *threads;
10 struct perf_evsel *evsel;
11 struct perf_event_attr attr;
12 unsigned int nr_open_calls = 111, i;
13 int id = trace_event__id("sys_enter_open");
16 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
20 threads = thread_map__new(-1, getpid(), UINT_MAX);
21 if (threads == NULL) {
22 pr_debug("thread_map__new\n");
26 memset(&attr, 0, sizeof(attr));
27 attr.type = PERF_TYPE_TRACEPOINT;
29 evsel = perf_evsel__new(&attr, 0);
31 pr_debug("perf_evsel__new\n");
32 goto out_thread_map_delete;
35 if (perf_evsel__open_per_thread(evsel, threads) < 0) {
36 pr_debug("failed to open counter: %s, "
37 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
39 goto out_evsel_delete;
42 for (i = 0; i < nr_open_calls; ++i) {
43 fd = open("/etc/passwd", O_RDONLY);
47 if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
48 pr_debug("perf_evsel__read_on_cpu\n");
52 if (evsel->counts->cpu[0].val != nr_open_calls) {
53 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
54 nr_open_calls, evsel->counts->cpu[0].val);
60 perf_evsel__close_fd(evsel, 1, threads->nr);
62 perf_evsel__delete(evsel);
63 out_thread_map_delete:
64 thread_map__delete(threads);