1#include "thread_map.h"
2#include "evsel.h"
3#include "debug.h"
4#include "tests.h"
5
6int test__open_syscall_event(void)
7{
8	int err = -1, fd;
9	struct perf_evsel *evsel;
10	unsigned int nr_open_calls = 111, i;
11	struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
12
13	if (threads == NULL) {
14		pr_debug("thread_map__new\n");
15		return -1;
16	}
17
18	evsel = perf_evsel__newtp("syscalls", "sys_enter_open", 0);
19	if (evsel == NULL) {
20		pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
21		goto out_thread_map_delete;
22	}
23
24	if (perf_evsel__open_per_thread(evsel, threads) < 0) {
25		pr_debug("failed to open counter: %s, "
26			 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
27			 strerror(errno));
28		goto out_evsel_delete;
29	}
30
31	for (i = 0; i < nr_open_calls; ++i) {
32		fd = open("/etc/passwd", O_RDONLY);
33		close(fd);
34	}
35
36	if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
37		pr_debug("perf_evsel__read_on_cpu\n");
38		goto out_close_fd;
39	}
40
41	if (evsel->counts->cpu[0].val != nr_open_calls) {
42		pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
43			 nr_open_calls, evsel->counts->cpu[0].val);
44		goto out_close_fd;
45	}
46
47	err = 0;
48out_close_fd:
49	perf_evsel__close_fd(evsel, 1, threads->nr);
50out_evsel_delete:
51	perf_evsel__delete(evsel);
52out_thread_map_delete:
53	thread_map__delete(threads);
54	return err;
55}
56