1 #include "thread_map.h" 2 #include "evsel.h" 3 #include "debug.h" 4 #include "tests.h" 5 6 int 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; 48 out_close_fd: 49 perf_evsel__close_fd(evsel, 1, threads->nr); 50 out_evsel_delete: 51 perf_evsel__delete(evsel); 52 out_thread_map_delete: 53 thread_map__delete(threads); 54 return err; 55 } 56
