1*fbb2df23SRiku Voipio #include "thread_map.h" 2*fbb2df23SRiku Voipio #include "evsel.h" 3*fbb2df23SRiku Voipio #include "debug.h" 4*fbb2df23SRiku Voipio #include "tests.h" 5*fbb2df23SRiku Voipio 6*fbb2df23SRiku Voipio int test__openat_syscall_event(void) 7*fbb2df23SRiku Voipio { 8*fbb2df23SRiku Voipio int err = -1, fd; 9*fbb2df23SRiku Voipio struct perf_evsel *evsel; 10*fbb2df23SRiku Voipio unsigned int nr_openat_calls = 111, i; 11*fbb2df23SRiku Voipio struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX); 12*fbb2df23SRiku Voipio char sbuf[STRERR_BUFSIZE]; 13*fbb2df23SRiku Voipio 14*fbb2df23SRiku Voipio if (threads == NULL) { 15*fbb2df23SRiku Voipio pr_debug("thread_map__new\n"); 16*fbb2df23SRiku Voipio return -1; 17*fbb2df23SRiku Voipio } 18*fbb2df23SRiku Voipio 19*fbb2df23SRiku Voipio evsel = perf_evsel__newtp("syscalls", "sys_enter_openat"); 20*fbb2df23SRiku Voipio if (evsel == NULL) { 21*fbb2df23SRiku Voipio if (tracefs_configured()) 22*fbb2df23SRiku Voipio pr_debug("is tracefs mounted on /sys/kernel/tracing?\n"); 23*fbb2df23SRiku Voipio else if (debugfs_configured()) 24*fbb2df23SRiku Voipio pr_debug("is debugfs mounted on /sys/kernel/debug?\n"); 25*fbb2df23SRiku Voipio else 26*fbb2df23SRiku Voipio pr_debug("Neither tracefs or debugfs is enabled in this kernel\n"); 27*fbb2df23SRiku Voipio goto out_thread_map_delete; 28*fbb2df23SRiku Voipio } 29*fbb2df23SRiku Voipio 30*fbb2df23SRiku Voipio if (perf_evsel__open_per_thread(evsel, threads) < 0) { 31*fbb2df23SRiku Voipio pr_debug("failed to open counter: %s, " 32*fbb2df23SRiku Voipio "tweak /proc/sys/kernel/perf_event_paranoid?\n", 33*fbb2df23SRiku Voipio strerror_r(errno, sbuf, sizeof(sbuf))); 34*fbb2df23SRiku Voipio goto out_evsel_delete; 35*fbb2df23SRiku Voipio } 36*fbb2df23SRiku Voipio 37*fbb2df23SRiku Voipio for (i = 0; i < nr_openat_calls; ++i) { 38*fbb2df23SRiku Voipio fd = openat(0, "/etc/passwd", O_RDONLY); 39*fbb2df23SRiku Voipio close(fd); 40*fbb2df23SRiku Voipio } 41*fbb2df23SRiku Voipio 42*fbb2df23SRiku Voipio if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) { 43*fbb2df23SRiku Voipio pr_debug("perf_evsel__read_on_cpu\n"); 44*fbb2df23SRiku Voipio goto out_close_fd; 45*fbb2df23SRiku Voipio } 46*fbb2df23SRiku Voipio 47*fbb2df23SRiku Voipio if (evsel->counts->cpu[0].val != nr_openat_calls) { 48*fbb2df23SRiku Voipio pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n", 49*fbb2df23SRiku Voipio nr_openat_calls, evsel->counts->cpu[0].val); 50*fbb2df23SRiku Voipio goto out_close_fd; 51*fbb2df23SRiku Voipio } 52*fbb2df23SRiku Voipio 53*fbb2df23SRiku Voipio err = 0; 54*fbb2df23SRiku Voipio out_close_fd: 55*fbb2df23SRiku Voipio perf_evsel__close_fd(evsel, 1, threads->nr); 56*fbb2df23SRiku Voipio out_evsel_delete: 57*fbb2df23SRiku Voipio perf_evsel__delete(evsel); 58*fbb2df23SRiku Voipio out_thread_map_delete: 59*fbb2df23SRiku Voipio thread_map__delete(threads); 60*fbb2df23SRiku Voipio return err; 61*fbb2df23SRiku Voipio } 62