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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-09-26 12:23:10 -0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-09-26 12:42:01 -0400
commiteb2f270338461a4de659a21946739748160c0816 (patch)
tree77e330fba386ef9b977afdac6c79fe14fcb19a80 /tools
parente6b6f6795265ec19ff35572f527bb74c07ff9399 (diff)
perf test: Add test to check we correctly parse and match syscall open parms
It will set up a syscall open tracepoint event, generate an open with invalid flags, then check those flags were the ones reported in the tracepoint fired. For the filename we need vfs:getname, but that will go thru some more iterations as the vfs getname codebase is going thru changes lately. When that is in I'll just check that the perf_evsel__newtp constructor is not bailing out and then add it to the evlist, catch the event and check the filename against the one used in the 'open' call used to trigger the event. Cc: David Ahern <dsahern@gmail.com> Cc: Eric Paris <eparis@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jeff Layton <jlayton@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-p5w9aq0jcbb91ghzqomowm16@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-test.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 2fd2c031f627..484f26cc0c00 100644
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -1289,6 +1289,118 @@ static int perf_evsel__tp_sched_test(void)
1289 return ret; 1289 return ret;
1290} 1290}
1291 1291
1292static int test__syscall_open_tp_fields(void)
1293{
1294 struct perf_record_opts opts = {
1295 .target = {
1296 .uid = UINT_MAX,
1297 .uses_mmap = true,
1298 },
1299 .no_delay = true,
1300 .freq = 1,
1301 .mmap_pages = 256,
1302 .raw_samples = true,
1303 };
1304 const char *filename = "/etc/passwd";
1305 int flags = O_RDONLY | O_DIRECTORY;
1306 struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
1307 struct perf_evsel *evsel;
1308 int err = -1, i, nr_events = 0, nr_polls = 0;
1309
1310 if (evlist == NULL) {
1311 pr_debug("%s: perf_evlist__new\n", __func__);
1312 goto out;
1313 }
1314
1315 evsel = perf_evsel__newtp("syscalls", "sys_enter_open", 0);
1316 if (evsel == NULL) {
1317 pr_debug("%s: perf_evsel__newtp\n", __func__);
1318 goto out_delete_evlist;
1319 }
1320
1321 perf_evlist__add(evlist, evsel);
1322
1323 err = perf_evlist__create_maps(evlist, &opts.target);
1324 if (err < 0) {
1325 pr_debug("%s: perf_evlist__create_maps\n", __func__);
1326 goto out_delete_evlist;
1327 }
1328
1329 perf_evsel__config(evsel, &opts, evsel);
1330
1331 evlist->threads->map[0] = getpid();
1332
1333 err = perf_evlist__open(evlist);
1334 if (err < 0) {
1335 pr_debug("perf_evlist__open: %s\n", strerror(errno));
1336 goto out_delete_evlist;
1337 }
1338
1339 err = perf_evlist__mmap(evlist, UINT_MAX, false);
1340 if (err < 0) {
1341 pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
1342 goto out_delete_evlist;
1343 }
1344
1345 perf_evlist__enable(evlist);
1346
1347 /*
1348 * Generate the event:
1349 */
1350 open(filename, flags);
1351
1352 while (1) {
1353 int before = nr_events;
1354
1355 for (i = 0; i < evlist->nr_mmaps; i++) {
1356 union perf_event *event;
1357
1358 while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
1359 const u32 type = event->header.type;
1360 int tp_flags;
1361 struct perf_sample sample;
1362
1363 ++nr_events;
1364
1365 if (type != PERF_RECORD_SAMPLE)
1366 continue;
1367
1368 err = perf_evsel__parse_sample(evsel, event, &sample);
1369 if (err) {
1370 pr_err("Can't parse sample, err = %d\n", err);
1371 goto out_munmap;
1372 }
1373
1374 tp_flags = perf_evsel__intval(evsel, &sample, "flags");
1375
1376 if (flags != tp_flags) {
1377 pr_debug("%s: Expected flags=%#x, got %#x\n",
1378 __func__, flags, tp_flags);
1379 goto out_munmap;
1380 }
1381
1382 goto out_ok;
1383 }
1384 }
1385
1386 if (nr_events == before)
1387 poll(evlist->pollfd, evlist->nr_fds, 10);
1388
1389 if (++nr_polls > 5) {
1390 pr_debug("%s: no events!\n", __func__);
1391 goto out_munmap;
1392 }
1393 }
1394out_ok:
1395 err = 0;
1396out_munmap:
1397 perf_evlist__munmap(evlist);
1398out_delete_evlist:
1399 perf_evlist__delete(evlist);
1400out:
1401 return err;
1402}
1403
1292static struct test { 1404static struct test {
1293 const char *desc; 1405 const char *desc;
1294 int (*func)(void); 1406 int (*func)(void);
@@ -1340,6 +1452,10 @@ static struct test {
1340 .func = perf_evsel__tp_sched_test, 1452 .func = perf_evsel__tp_sched_test,
1341 }, 1453 },
1342 { 1454 {
1455 .desc = "Generate and check syscalls:sys_enter_open event fields",
1456 .func = test__syscall_open_tp_fields,
1457 },
1458 {
1343 .func = NULL, 1459 .func = NULL,
1344 }, 1460 },
1345}; 1461};