1 /*
2 * builtin-test.c
3 *
4 * Builtin regression testing command: ever growing number of sanity tests
5 */
6 #include "builtin.h"
7
8 #include "util/cache.h"
9 #include "util/debug.h"
10 #include "util/debugfs.h"
11 #include "util/evlist.h"
12 #include "util/parse-options.h"
13 #include "util/parse-events.h"
14 #include "util/symbol.h"
15 #include "util/thread_map.h"
16 #include "util/pmu.h"
17 #include "../../include/linux/hw_breakpoint.h"
18
19 #include <sys/mman.h>
20
vmlinux_matches_kallsyms_filter(struct map * map __used,struct symbol * sym)21 static int vmlinux_matches_kallsyms_filter(struct map *map __used, struct symbol *sym)
22 {
23 bool *visited = symbol__priv(sym);
24 *visited = true;
25 return 0;
26 }
27
test__vmlinux_matches_kallsyms(void)28 static int test__vmlinux_matches_kallsyms(void)
29 {
30 int err = -1;
31 struct rb_node *nd;
32 struct symbol *sym;
33 struct map *kallsyms_map, *vmlinux_map;
34 struct machine kallsyms, vmlinux;
35 enum map_type type = MAP__FUNCTION;
36 long page_size = sysconf(_SC_PAGE_SIZE);
37 struct ref_reloc_sym ref_reloc_sym = { .name = "_stext", };
38
39 /*
40 * Step 1:
41 *
42 * Init the machines that will hold kernel, modules obtained from
43 * both vmlinux + .ko files and from /proc/kallsyms split by modules.
44 */
45 machine__init(&kallsyms, "", HOST_KERNEL_ID);
46 machine__init(&vmlinux, "", HOST_KERNEL_ID);
47
48 /*
49 * Step 2:
50 *
51 * Create the kernel maps for kallsyms and the DSO where we will then
52 * load /proc/kallsyms. Also create the modules maps from /proc/modules
53 * and find the .ko files that match them in /lib/modules/`uname -r`/.
54 */
55 if (machine__create_kernel_maps(&kallsyms) < 0) {
56 pr_debug("machine__create_kernel_maps ");
57 return -1;
58 }
59
60 /*
61 * Step 3:
62 *
63 * Load and split /proc/kallsyms into multiple maps, one per module.
64 */
65 if (machine__load_kallsyms(&kallsyms, "/proc/kallsyms", type, NULL) <= 0) {
66 pr_debug("dso__load_kallsyms ");
67 goto out;
68 }
69
70 /*
71 * Step 4:
72 *
73 * kallsyms will be internally on demand sorted by name so that we can
74 * find the reference relocation * symbol, i.e. the symbol we will use
75 * to see if the running kernel was relocated by checking if it has the
76 * same value in the vmlinux file we load.
77 */
78 kallsyms_map = machine__kernel_map(&kallsyms, type);
79
80 sym = map__find_symbol_by_name(kallsyms_map, ref_reloc_sym.name, NULL);
81 if (sym == NULL) {
82 pr_debug("dso__find_symbol_by_name ");
83 goto out;
84 }
85
86 ref_reloc_sym.addr = sym->start;
87
88 /*
89 * Step 5:
90 *
91 * Now repeat step 2, this time for the vmlinux file we'll auto-locate.
92 */
93 if (machine__create_kernel_maps(&vmlinux) < 0) {
94 pr_debug("machine__create_kernel_maps ");
95 goto out;
96 }
97
98 vmlinux_map = machine__kernel_map(&vmlinux, type);
99 map__kmap(vmlinux_map)->ref_reloc_sym = &ref_reloc_sym;
100
101 /*
102 * Step 6:
103 *
104 * Locate a vmlinux file in the vmlinux path that has a buildid that
105 * matches the one of the running kernel.
106 *
107 * While doing that look if we find the ref reloc symbol, if we find it
108 * we'll have its ref_reloc_symbol.unrelocated_addr and then
109 * maps__reloc_vmlinux will notice and set proper ->[un]map_ip routines
110 * to fixup the symbols.
111 */
112 if (machine__load_vmlinux_path(&vmlinux, type,
113 vmlinux_matches_kallsyms_filter) <= 0) {
114 pr_debug("machine__load_vmlinux_path ");
115 goto out;
116 }
117
118 err = 0;
119 /*
120 * Step 7:
121 *
122 * Now look at the symbols in the vmlinux DSO and check if we find all of them
123 * in the kallsyms dso. For the ones that are in both, check its names and
124 * end addresses too.
125 */
126 for (nd = rb_first(&vmlinux_map->dso->symbols[type]); nd; nd = rb_next(nd)) {
127 struct symbol *pair, *first_pair;
128 bool backwards = true;
129
130 sym = rb_entry(nd, struct symbol, rb_node);
131
132 if (sym->start == sym->end)
133 continue;
134
135 first_pair = machine__find_kernel_symbol(&kallsyms, type, sym->start, NULL, NULL);
136 pair = first_pair;
137
138 if (pair && pair->start == sym->start) {
139 next_pair:
140 if (strcmp(sym->name, pair->name) == 0) {
141 /*
142 * kallsyms don't have the symbol end, so we
143 * set that by using the next symbol start - 1,
144 * in some cases we get this up to a page
145 * wrong, trace_kmalloc when I was developing
146 * this code was one such example, 2106 bytes
147 * off the real size. More than that and we
148 * _really_ have a problem.
149 */
150 s64 skew = sym->end - pair->end;
151 if (llabs(skew) < page_size)
152 continue;
153
154 pr_debug("%#" PRIx64 ": diff end addr for %s v: %#" PRIx64 " k: %#" PRIx64 "\n",
155 sym->start, sym->name, sym->end, pair->end);
156 } else {
157 struct rb_node *nnd;
158 detour:
159 nnd = backwards ? rb_prev(&pair->rb_node) :
160 rb_next(&pair->rb_node);
161 if (nnd) {
162 struct symbol *next = rb_entry(nnd, struct symbol, rb_node);
163
164 if (next->start == sym->start) {
165 pair = next;
166 goto next_pair;
167 }
168 }
169
170 if (backwards) {
171 backwards = false;
172 pair = first_pair;
173 goto detour;
174 }
175
176 pr_debug("%#" PRIx64 ": diff name v: %s k: %s\n",
177 sym->start, sym->name, pair->name);
178 }
179 } else
180 pr_debug("%#" PRIx64 ": %s not on kallsyms\n", sym->start, sym->name);
181
182 err = -1;
183 }
184
185 if (!verbose)
186 goto out;
187
188 pr_info("Maps only in vmlinux:\n");
189
190 for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
191 struct map *pos = rb_entry(nd, struct map, rb_node), *pair;
192 /*
193 * If it is the kernel, kallsyms is always "[kernel.kallsyms]", while
194 * the kernel will have the path for the vmlinux file being used,
195 * so use the short name, less descriptive but the same ("[kernel]" in
196 * both cases.
197 */
198 pair = map_groups__find_by_name(&kallsyms.kmaps, type,
199 (pos->dso->kernel ?
200 pos->dso->short_name :
201 pos->dso->name));
202 if (pair)
203 pair->priv = 1;
204 else
205 map__fprintf(pos, stderr);
206 }
207
208 pr_info("Maps in vmlinux with a different name in kallsyms:\n");
209
210 for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
211 struct map *pos = rb_entry(nd, struct map, rb_node), *pair;
212
213 pair = map_groups__find(&kallsyms.kmaps, type, pos->start);
214 if (pair == NULL || pair->priv)
215 continue;
216
217 if (pair->start == pos->start) {
218 pair->priv = 1;
219 pr_info(" %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s in kallsyms as",
220 pos->start, pos->end, pos->pgoff, pos->dso->name);
221 if (pos->pgoff != pair->pgoff || pos->end != pair->end)
222 pr_info(": \n*%" PRIx64 "-%" PRIx64 " %" PRIx64 "",
223 pair->start, pair->end, pair->pgoff);
224 pr_info(" %s\n", pair->dso->name);
225 pair->priv = 1;
226 }
227 }
228
229 pr_info("Maps only in kallsyms:\n");
230
231 for (nd = rb_first(&kallsyms.kmaps.maps[type]);
232 nd; nd = rb_next(nd)) {
233 struct map *pos = rb_entry(nd, struct map, rb_node);
234
235 if (!pos->priv)
236 map__fprintf(pos, stderr);
237 }
238 out:
239 return err;
240 }
241
242 #include "util/cpumap.h"
243 #include "util/evsel.h"
244 #include <sys/types.h>
245
trace_event__id(const char * evname)246 static int trace_event__id(const char *evname)
247 {
248 char *filename;
249 int err = -1, fd;
250
251 if (asprintf(&filename,
252 "%s/syscalls/%s/id",
253 tracing_events_path, evname) < 0)
254 return -1;
255
256 fd = open(filename, O_RDONLY);
257 if (fd >= 0) {
258 char id[16];
259 if (read(fd, id, sizeof(id)) > 0)
260 err = atoi(id);
261 close(fd);
262 }
263
264 free(filename);
265 return err;
266 }
267
test__open_syscall_event(void)268 static int test__open_syscall_event(void)
269 {
270 int err = -1, fd;
271 struct thread_map *threads;
272 struct perf_evsel *evsel;
273 struct perf_event_attr attr;
274 unsigned int nr_open_calls = 111, i;
275 int id = trace_event__id("sys_enter_open");
276
277 if (id < 0) {
278 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
279 return -1;
280 }
281
282 threads = thread_map__new(-1, getpid(), UINT_MAX);
283 if (threads == NULL) {
284 pr_debug("thread_map__new\n");
285 return -1;
286 }
287
288 memset(&attr, 0, sizeof(attr));
289 attr.type = PERF_TYPE_TRACEPOINT;
290 attr.config = id;
291 evsel = perf_evsel__new(&attr, 0);
292 if (evsel == NULL) {
293 pr_debug("perf_evsel__new\n");
294 goto out_thread_map_delete;
295 }
296
297 if (perf_evsel__open_per_thread(evsel, threads, false, NULL) < 0) {
298 pr_debug("failed to open counter: %s, "
299 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
300 strerror(errno));
301 goto out_evsel_delete;
302 }
303
304 for (i = 0; i < nr_open_calls; ++i) {
305 fd = open("/etc/passwd", O_RDONLY);
306 close(fd);
307 }
308
309 if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
310 pr_debug("perf_evsel__read_on_cpu\n");
311 goto out_close_fd;
312 }
313
314 if (evsel->counts->cpu[0].val != nr_open_calls) {
315 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
316 nr_open_calls, evsel->counts->cpu[0].val);
317 goto out_close_fd;
318 }
319
320 err = 0;
321 out_close_fd:
322 perf_evsel__close_fd(evsel, 1, threads->nr);
323 out_evsel_delete:
324 perf_evsel__delete(evsel);
325 out_thread_map_delete:
326 thread_map__delete(threads);
327 return err;
328 }
329
330 #include <sched.h>
331
test__open_syscall_event_on_all_cpus(void)332 static int test__open_syscall_event_on_all_cpus(void)
333 {
334 int err = -1, fd, cpu;
335 struct thread_map *threads;
336 struct cpu_map *cpus;
337 struct perf_evsel *evsel;
338 struct perf_event_attr attr;
339 unsigned int nr_open_calls = 111, i;
340 cpu_set_t cpu_set;
341 int id = trace_event__id("sys_enter_open");
342
343 if (id < 0) {
344 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
345 return -1;
346 }
347
348 threads = thread_map__new(-1, getpid(), UINT_MAX);
349 if (threads == NULL) {
350 pr_debug("thread_map__new\n");
351 return -1;
352 }
353
354 cpus = cpu_map__new(NULL);
355 if (cpus == NULL) {
356 pr_debug("cpu_map__new\n");
357 goto out_thread_map_delete;
358 }
359
360
361 CPU_ZERO(&cpu_set);
362
363 memset(&attr, 0, sizeof(attr));
364 attr.type = PERF_TYPE_TRACEPOINT;
365 attr.config = id;
366 evsel = perf_evsel__new(&attr, 0);
367 if (evsel == NULL) {
368 pr_debug("perf_evsel__new\n");
369 goto out_thread_map_delete;
370 }
371
372 if (perf_evsel__open(evsel, cpus, threads, false, NULL) < 0) {
373 pr_debug("failed to open counter: %s, "
374 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
375 strerror(errno));
376 goto out_evsel_delete;
377 }
378
379 for (cpu = 0; cpu < cpus->nr; ++cpu) {
380 unsigned int ncalls = nr_open_calls + cpu;
381 /*
382 * XXX eventually lift this restriction in a way that
383 * keeps perf building on older glibc installations
384 * without CPU_ALLOC. 1024 cpus in 2010 still seems
385 * a reasonable upper limit tho :-)
386 */
387 if (cpus->map[cpu] >= CPU_SETSIZE) {
388 pr_debug("Ignoring CPU %d\n", cpus->map[cpu]);
389 continue;
390 }
391
392 CPU_SET(cpus->map[cpu], &cpu_set);
393 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
394 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
395 cpus->map[cpu],
396 strerror(errno));
397 goto out_close_fd;
398 }
399 for (i = 0; i < ncalls; ++i) {
400 fd = open("/etc/passwd", O_RDONLY);
401 close(fd);
402 }
403 CPU_CLR(cpus->map[cpu], &cpu_set);
404 }
405
406 /*
407 * Here we need to explicitely preallocate the counts, as if
408 * we use the auto allocation it will allocate just for 1 cpu,
409 * as we start by cpu 0.
410 */
411 if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) {
412 pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr);
413 goto out_close_fd;
414 }
415
416 err = 0;
417
418 for (cpu = 0; cpu < cpus->nr; ++cpu) {
419 unsigned int expected;
420
421 if (cpus->map[cpu] >= CPU_SETSIZE)
422 continue;
423
424 if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) {
425 pr_debug("perf_evsel__read_on_cpu\n");
426 err = -1;
427 break;
428 }
429
430 expected = nr_open_calls + cpu;
431 if (evsel->counts->cpu[cpu].val != expected) {
432 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
433 expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
434 err = -1;
435 }
436 }
437
438 out_close_fd:
439 perf_evsel__close_fd(evsel, 1, threads->nr);
440 out_evsel_delete:
441 perf_evsel__delete(evsel);
442 out_thread_map_delete:
443 thread_map__delete(threads);
444 return err;
445 }
446
447 /*
448 * This test will generate random numbers of calls to some getpid syscalls,
449 * then establish an mmap for a group of events that are created to monitor
450 * the syscalls.
451 *
452 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
453 * sample.id field to map back to its respective perf_evsel instance.
454 *
455 * Then it checks if the number of syscalls reported as perf events by
456 * the kernel corresponds to the number of syscalls made.
457 */
test__basic_mmap(void)458 static int test__basic_mmap(void)
459 {
460 int err = -1;
461 union perf_event *event;
462 struct thread_map *threads;
463 struct cpu_map *cpus;
464 struct perf_evlist *evlist;
465 struct perf_event_attr attr = {
466 .type = PERF_TYPE_TRACEPOINT,
467 .read_format = PERF_FORMAT_ID,
468 .sample_type = PERF_SAMPLE_ID,
469 .watermark = 0,
470 };
471 cpu_set_t cpu_set;
472 const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
473 "getpgid", };
474 pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
475 (void*)getpgid };
476 #define nsyscalls ARRAY_SIZE(syscall_names)
477 int ids[nsyscalls];
478 unsigned int nr_events[nsyscalls],
479 expected_nr_events[nsyscalls], i, j;
480 struct perf_evsel *evsels[nsyscalls], *evsel;
481 int sample_size = __perf_evsel__sample_size(attr.sample_type);
482
483 for (i = 0; i < nsyscalls; ++i) {
484 char name[64];
485
486 snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
487 ids[i] = trace_event__id(name);
488 if (ids[i] < 0) {
489 pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");
490 return -1;
491 }
492 nr_events[i] = 0;
493 expected_nr_events[i] = random() % 257;
494 }
495
496 threads = thread_map__new(-1, getpid(), UINT_MAX);
497 if (threads == NULL) {
498 pr_debug("thread_map__new\n");
499 return -1;
500 }
501
502 cpus = cpu_map__new(NULL);
503 if (cpus == NULL) {
504 pr_debug("cpu_map__new\n");
505 goto out_free_threads;
506 }
507
508 CPU_ZERO(&cpu_set);
509 CPU_SET(cpus->map[0], &cpu_set);
510 sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
511 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
512 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
513 cpus->map[0], strerror(errno));
514 goto out_free_cpus;
515 }
516
517 evlist = perf_evlist__new(cpus, threads);
518 if (evlist == NULL) {
519 pr_debug("perf_evlist__new\n");
520 goto out_free_cpus;
521 }
522
523 /* anonymous union fields, can't be initialized above */
524 attr.wakeup_events = 1;
525 attr.sample_period = 1;
526
527 for (i = 0; i < nsyscalls; ++i) {
528 attr.config = ids[i];
529 evsels[i] = perf_evsel__new(&attr, i);
530 if (evsels[i] == NULL) {
531 pr_debug("perf_evsel__new\n");
532 goto out_free_evlist;
533 }
534
535 perf_evlist__add(evlist, evsels[i]);
536
537 if (perf_evsel__open(evsels[i], cpus, threads, false, NULL) < 0) {
538 pr_debug("failed to open counter: %s, "
539 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
540 strerror(errno));
541 goto out_close_fd;
542 }
543 }
544
545 if (perf_evlist__mmap(evlist, 128, true) < 0) {
546 pr_debug("failed to mmap events: %d (%s)\n", errno,
547 strerror(errno));
548 goto out_close_fd;
549 }
550
551 for (i = 0; i < nsyscalls; ++i)
552 for (j = 0; j < expected_nr_events[i]; ++j) {
553 int foo = syscalls[i]();
554 ++foo;
555 }
556
557 while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
558 struct perf_sample sample;
559
560 if (event->header.type != PERF_RECORD_SAMPLE) {
561 pr_debug("unexpected %s event\n",
562 perf_event__name(event->header.type));
563 goto out_munmap;
564 }
565
566 err = perf_event__parse_sample(event, attr.sample_type, sample_size,
567 false, &sample, false);
568 if (err) {
569 pr_err("Can't parse sample, err = %d\n", err);
570 goto out_munmap;
571 }
572
573 evsel = perf_evlist__id2evsel(evlist, sample.id);
574 if (evsel == NULL) {
575 pr_debug("event with id %" PRIu64
576 " doesn't map to an evsel\n", sample.id);
577 goto out_munmap;
578 }
579 nr_events[evsel->idx]++;
580 }
581
582 list_for_each_entry(evsel, &evlist->entries, node) {
583 if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
584 pr_debug("expected %d %s events, got %d\n",
585 expected_nr_events[evsel->idx],
586 event_name(evsel), nr_events[evsel->idx]);
587 goto out_munmap;
588 }
589 }
590
591 err = 0;
592 out_munmap:
593 perf_evlist__munmap(evlist);
594 out_close_fd:
595 for (i = 0; i < nsyscalls; ++i)
596 perf_evsel__close_fd(evsels[i], 1, threads->nr);
597 out_free_evlist:
598 perf_evlist__delete(evlist);
599 out_free_cpus:
600 cpu_map__delete(cpus);
601 out_free_threads:
602 thread_map__delete(threads);
603 return err;
604 #undef nsyscalls
605 }
606
607 #define TEST_ASSERT_VAL(text, cond) \
608 do { \
609 if (!(cond)) { \
610 pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
611 return -1; \
612 } \
613 } while (0)
614
test__checkevent_tracepoint(struct perf_evlist * evlist)615 static int test__checkevent_tracepoint(struct perf_evlist *evlist)
616 {
617 struct perf_evsel *evsel = list_entry(evlist->entries.next,
618 struct perf_evsel, node);
619
620 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
621 TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
622 TEST_ASSERT_VAL("wrong sample_type",
623 (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU) ==
624 evsel->attr.sample_type);
625 TEST_ASSERT_VAL("wrong sample_period", 1 == evsel->attr.sample_period);
626 return 0;
627 }
628
test__checkevent_tracepoint_multi(struct perf_evlist * evlist)629 static int test__checkevent_tracepoint_multi(struct perf_evlist *evlist)
630 {
631 struct perf_evsel *evsel;
632
633 TEST_ASSERT_VAL("wrong number of entries", evlist->nr_entries > 1);
634
635 list_for_each_entry(evsel, &evlist->entries, node) {
636 TEST_ASSERT_VAL("wrong type",
637 PERF_TYPE_TRACEPOINT == evsel->attr.type);
638 TEST_ASSERT_VAL("wrong sample_type",
639 (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU)
640 == evsel->attr.sample_type);
641 TEST_ASSERT_VAL("wrong sample_period",
642 1 == evsel->attr.sample_period);
643 }
644 return 0;
645 }
646
test__checkevent_raw(struct perf_evlist * evlist)647 static int test__checkevent_raw(struct perf_evlist *evlist)
648 {
649 struct perf_evsel *evsel = list_entry(evlist->entries.next,
650 struct perf_evsel, node);
651
652 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
653 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
654 TEST_ASSERT_VAL("wrong config", 0x1a == evsel->attr.config);
655 return 0;
656 }
657
test__checkevent_numeric(struct perf_evlist * evlist)658 static int test__checkevent_numeric(struct perf_evlist *evlist)
659 {
660 struct perf_evsel *evsel = list_entry(evlist->entries.next,
661 struct perf_evsel, node);
662
663 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
664 TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
665 TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
666 return 0;
667 }
668
test__checkevent_symbolic_name(struct perf_evlist * evlist)669 static int test__checkevent_symbolic_name(struct perf_evlist *evlist)
670 {
671 struct perf_evsel *evsel = list_entry(evlist->entries.next,
672 struct perf_evsel, node);
673
674 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
675 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
676 TEST_ASSERT_VAL("wrong config",
677 PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
678 return 0;
679 }
680
test__checkevent_symbolic_name_config(struct perf_evlist * evlist)681 static int test__checkevent_symbolic_name_config(struct perf_evlist *evlist)
682 {
683 struct perf_evsel *evsel = list_entry(evlist->entries.next,
684 struct perf_evsel, node);
685
686 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
687 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
688 TEST_ASSERT_VAL("wrong config",
689 PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
690 TEST_ASSERT_VAL("wrong period",
691 100000 == evsel->attr.sample_period);
692 TEST_ASSERT_VAL("wrong config1",
693 0 == evsel->attr.config1);
694 TEST_ASSERT_VAL("wrong config2",
695 1 == evsel->attr.config2);
696 return 0;
697 }
698
test__checkevent_symbolic_alias(struct perf_evlist * evlist)699 static int test__checkevent_symbolic_alias(struct perf_evlist *evlist)
700 {
701 struct perf_evsel *evsel = list_entry(evlist->entries.next,
702 struct perf_evsel, node);
703
704 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
705 TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->attr.type);
706 TEST_ASSERT_VAL("wrong config",
707 PERF_COUNT_SW_PAGE_FAULTS == evsel->attr.config);
708 return 0;
709 }
710
test__checkevent_genhw(struct perf_evlist * evlist)711 static int test__checkevent_genhw(struct perf_evlist *evlist)
712 {
713 struct perf_evsel *evsel = list_entry(evlist->entries.next,
714 struct perf_evsel, node);
715
716 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
717 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HW_CACHE == evsel->attr.type);
718 TEST_ASSERT_VAL("wrong config", (1 << 16) == evsel->attr.config);
719 return 0;
720 }
721
test__checkevent_breakpoint(struct perf_evlist * evlist)722 static int test__checkevent_breakpoint(struct perf_evlist *evlist)
723 {
724 struct perf_evsel *evsel = list_entry(evlist->entries.next,
725 struct perf_evsel, node);
726
727 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
728 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
729 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
730 TEST_ASSERT_VAL("wrong bp_type", (HW_BREAKPOINT_R | HW_BREAKPOINT_W) ==
731 evsel->attr.bp_type);
732 TEST_ASSERT_VAL("wrong bp_len", HW_BREAKPOINT_LEN_4 ==
733 evsel->attr.bp_len);
734 return 0;
735 }
736
test__checkevent_breakpoint_x(struct perf_evlist * evlist)737 static int test__checkevent_breakpoint_x(struct perf_evlist *evlist)
738 {
739 struct perf_evsel *evsel = list_entry(evlist->entries.next,
740 struct perf_evsel, node);
741
742 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
743 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
744 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
745 TEST_ASSERT_VAL("wrong bp_type",
746 HW_BREAKPOINT_X == evsel->attr.bp_type);
747 TEST_ASSERT_VAL("wrong bp_len", sizeof(long) == evsel->attr.bp_len);
748 return 0;
749 }
750
test__checkevent_breakpoint_r(struct perf_evlist * evlist)751 static int test__checkevent_breakpoint_r(struct perf_evlist *evlist)
752 {
753 struct perf_evsel *evsel = list_entry(evlist->entries.next,
754 struct perf_evsel, node);
755
756 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
757 TEST_ASSERT_VAL("wrong type",
758 PERF_TYPE_BREAKPOINT == evsel->attr.type);
759 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
760 TEST_ASSERT_VAL("wrong bp_type",
761 HW_BREAKPOINT_R == evsel->attr.bp_type);
762 TEST_ASSERT_VAL("wrong bp_len",
763 HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
764 return 0;
765 }
766
test__checkevent_breakpoint_w(struct perf_evlist * evlist)767 static int test__checkevent_breakpoint_w(struct perf_evlist *evlist)
768 {
769 struct perf_evsel *evsel = list_entry(evlist->entries.next,
770 struct perf_evsel, node);
771
772 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
773 TEST_ASSERT_VAL("wrong type",
774 PERF_TYPE_BREAKPOINT == evsel->attr.type);
775 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
776 TEST_ASSERT_VAL("wrong bp_type",
777 HW_BREAKPOINT_W == evsel->attr.bp_type);
778 TEST_ASSERT_VAL("wrong bp_len",
779 HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
780 return 0;
781 }
782
test__checkevent_tracepoint_modifier(struct perf_evlist * evlist)783 static int test__checkevent_tracepoint_modifier(struct perf_evlist *evlist)
784 {
785 struct perf_evsel *evsel = list_entry(evlist->entries.next,
786 struct perf_evsel, node);
787
788 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
789 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
790 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
791 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
792
793 return test__checkevent_tracepoint(evlist);
794 }
795
796 static int
test__checkevent_tracepoint_multi_modifier(struct perf_evlist * evlist)797 test__checkevent_tracepoint_multi_modifier(struct perf_evlist *evlist)
798 {
799 struct perf_evsel *evsel;
800
801 TEST_ASSERT_VAL("wrong number of entries", evlist->nr_entries > 1);
802
803 list_for_each_entry(evsel, &evlist->entries, node) {
804 TEST_ASSERT_VAL("wrong exclude_user",
805 !evsel->attr.exclude_user);
806 TEST_ASSERT_VAL("wrong exclude_kernel",
807 evsel->attr.exclude_kernel);
808 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
809 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
810 }
811
812 return test__checkevent_tracepoint_multi(evlist);
813 }
814
test__checkevent_raw_modifier(struct perf_evlist * evlist)815 static int test__checkevent_raw_modifier(struct perf_evlist *evlist)
816 {
817 struct perf_evsel *evsel = list_entry(evlist->entries.next,
818 struct perf_evsel, node);
819
820 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
821 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
822 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
823 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
824
825 return test__checkevent_raw(evlist);
826 }
827
test__checkevent_numeric_modifier(struct perf_evlist * evlist)828 static int test__checkevent_numeric_modifier(struct perf_evlist *evlist)
829 {
830 struct perf_evsel *evsel = list_entry(evlist->entries.next,
831 struct perf_evsel, node);
832
833 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
834 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
835 TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
836 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
837
838 return test__checkevent_numeric(evlist);
839 }
840
test__checkevent_symbolic_name_modifier(struct perf_evlist * evlist)841 static int test__checkevent_symbolic_name_modifier(struct perf_evlist *evlist)
842 {
843 struct perf_evsel *evsel = list_entry(evlist->entries.next,
844 struct perf_evsel, node);
845
846 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
847 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
848 TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
849 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
850
851 return test__checkevent_symbolic_name(evlist);
852 }
853
test__checkevent_exclude_host_modifier(struct perf_evlist * evlist)854 static int test__checkevent_exclude_host_modifier(struct perf_evlist *evlist)
855 {
856 struct perf_evsel *evsel = list_entry(evlist->entries.next,
857 struct perf_evsel, node);
858
859 TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
860 TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
861
862 return test__checkevent_symbolic_name(evlist);
863 }
864
test__checkevent_exclude_guest_modifier(struct perf_evlist * evlist)865 static int test__checkevent_exclude_guest_modifier(struct perf_evlist *evlist)
866 {
867 struct perf_evsel *evsel = list_entry(evlist->entries.next,
868 struct perf_evsel, node);
869
870 TEST_ASSERT_VAL("wrong exclude guest", evsel->attr.exclude_guest);
871 TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
872
873 return test__checkevent_symbolic_name(evlist);
874 }
875
test__checkevent_symbolic_alias_modifier(struct perf_evlist * evlist)876 static int test__checkevent_symbolic_alias_modifier(struct perf_evlist *evlist)
877 {
878 struct perf_evsel *evsel = list_entry(evlist->entries.next,
879 struct perf_evsel, node);
880
881 TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
882 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
883 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
884 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
885
886 return test__checkevent_symbolic_alias(evlist);
887 }
888
test__checkevent_genhw_modifier(struct perf_evlist * evlist)889 static int test__checkevent_genhw_modifier(struct perf_evlist *evlist)
890 {
891 struct perf_evsel *evsel = list_entry(evlist->entries.next,
892 struct perf_evsel, node);
893
894 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
895 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
896 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
897 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
898
899 return test__checkevent_genhw(evlist);
900 }
901
test__checkevent_breakpoint_modifier(struct perf_evlist * evlist)902 static int test__checkevent_breakpoint_modifier(struct perf_evlist *evlist)
903 {
904 struct perf_evsel *evsel = list_entry(evlist->entries.next,
905 struct perf_evsel, node);
906
907 TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
908 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
909 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
910 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
911
912 return test__checkevent_breakpoint(evlist);
913 }
914
test__checkevent_breakpoint_x_modifier(struct perf_evlist * evlist)915 static int test__checkevent_breakpoint_x_modifier(struct perf_evlist *evlist)
916 {
917 struct perf_evsel *evsel = list_entry(evlist->entries.next,
918 struct perf_evsel, node);
919
920 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
921 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
922 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
923 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
924
925 return test__checkevent_breakpoint_x(evlist);
926 }
927
test__checkevent_breakpoint_r_modifier(struct perf_evlist * evlist)928 static int test__checkevent_breakpoint_r_modifier(struct perf_evlist *evlist)
929 {
930 struct perf_evsel *evsel = list_entry(evlist->entries.next,
931 struct perf_evsel, node);
932
933 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
934 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
935 TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
936 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
937
938 return test__checkevent_breakpoint_r(evlist);
939 }
940
test__checkevent_breakpoint_w_modifier(struct perf_evlist * evlist)941 static int test__checkevent_breakpoint_w_modifier(struct perf_evlist *evlist)
942 {
943 struct perf_evsel *evsel = list_entry(evlist->entries.next,
944 struct perf_evsel, node);
945
946 TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
947 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
948 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
949 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
950
951 return test__checkevent_breakpoint_w(evlist);
952 }
953
test__checkevent_pmu(struct perf_evlist * evlist)954 static int test__checkevent_pmu(struct perf_evlist *evlist)
955 {
956
957 struct perf_evsel *evsel = list_entry(evlist->entries.next,
958 struct perf_evsel, node);
959
960 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
961 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
962 TEST_ASSERT_VAL("wrong config", 10 == evsel->attr.config);
963 TEST_ASSERT_VAL("wrong config1", 1 == evsel->attr.config1);
964 TEST_ASSERT_VAL("wrong config2", 3 == evsel->attr.config2);
965 TEST_ASSERT_VAL("wrong period", 1000 == evsel->attr.sample_period);
966
967 return 0;
968 }
969
test__checkevent_list(struct perf_evlist * evlist)970 static int test__checkevent_list(struct perf_evlist *evlist)
971 {
972 struct perf_evsel *evsel;
973
974 TEST_ASSERT_VAL("wrong number of entries", 3 == evlist->nr_entries);
975
976 /* r1 */
977 evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
978 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
979 TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
980 TEST_ASSERT_VAL("wrong config1", 0 == evsel->attr.config1);
981 TEST_ASSERT_VAL("wrong config2", 0 == evsel->attr.config2);
982 TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
983 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
984 TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
985 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
986
987 /* syscalls:sys_enter_open:k */
988 evsel = list_entry(evsel->node.next, struct perf_evsel, node);
989 TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
990 TEST_ASSERT_VAL("wrong sample_type",
991 (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU) ==
992 evsel->attr.sample_type);
993 TEST_ASSERT_VAL("wrong sample_period", 1 == evsel->attr.sample_period);
994 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
995 TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
996 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
997 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
998
999 /* 1:1:hp */
1000 evsel = list_entry(evsel->node.next, struct perf_evsel, node);
1001 TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
1002 TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
1003 TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
1004 TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
1005 TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
1006 TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
1007
1008 return 0;
1009 }
1010
1011 static struct test__event_st {
1012 const char *name;
1013 __u32 type;
1014 int (*check)(struct perf_evlist *evlist);
1015 } test__events[] = {
1016 {
1017 .name = "syscalls:sys_enter_open",
1018 .check = test__checkevent_tracepoint,
1019 },
1020 {
1021 .name = "syscalls:*",
1022 .check = test__checkevent_tracepoint_multi,
1023 },
1024 {
1025 .name = "r1a",
1026 .check = test__checkevent_raw,
1027 },
1028 {
1029 .name = "1:1",
1030 .check = test__checkevent_numeric,
1031 },
1032 {
1033 .name = "instructions",
1034 .check = test__checkevent_symbolic_name,
1035 },
1036 {
1037 .name = "cycles/period=100000,config2/",
1038 .check = test__checkevent_symbolic_name_config,
1039 },
1040 {
1041 .name = "faults",
1042 .check = test__checkevent_symbolic_alias,
1043 },
1044 {
1045 .name = "L1-dcache-load-miss",
1046 .check = test__checkevent_genhw,
1047 },
1048 {
1049 .name = "mem:0",
1050 .check = test__checkevent_breakpoint,
1051 },
1052 {
1053 .name = "mem:0:x",
1054 .check = test__checkevent_breakpoint_x,
1055 },
1056 {
1057 .name = "mem:0:r",
1058 .check = test__checkevent_breakpoint_r,
1059 },
1060 {
1061 .name = "mem:0:w",
1062 .check = test__checkevent_breakpoint_w,
1063 },
1064 {
1065 .name = "syscalls:sys_enter_open:k",
1066 .check = test__checkevent_tracepoint_modifier,
1067 },
1068 {
1069 .name = "syscalls:*:u",
1070 .check = test__checkevent_tracepoint_multi_modifier,
1071 },
1072 {
1073 .name = "r1a:kp",
1074 .check = test__checkevent_raw_modifier,
1075 },
1076 {
1077 .name = "1:1:hp",
1078 .check = test__checkevent_numeric_modifier,
1079 },
1080 {
1081 .name = "instructions:h",
1082 .check = test__checkevent_symbolic_name_modifier,
1083 },
1084 {
1085 .name = "faults:u",
1086 .check = test__checkevent_symbolic_alias_modifier,
1087 },
1088 {
1089 .name = "L1-dcache-load-miss:kp",
1090 .check = test__checkevent_genhw_modifier,
1091 },
1092 {
1093 .name = "mem:0:u",
1094 .check = test__checkevent_breakpoint_modifier,
1095 },
1096 {
1097 .name = "mem:0:x:k",
1098 .check = test__checkevent_breakpoint_x_modifier,
1099 },
1100 {
1101 .name = "mem:0:r:hp",
1102 .check = test__checkevent_breakpoint_r_modifier,
1103 },
1104 {
1105 .name = "mem:0:w:up",
1106 .check = test__checkevent_breakpoint_w_modifier,
1107 },
1108 {
1109 .name = "cpu/config=10,config1,config2=3,period=1000/u",
1110 .check = test__checkevent_pmu,
1111 },
1112 {
1113 .name = "r1,syscalls:sys_enter_open:k,1:1:hp",
1114 .check = test__checkevent_list,
1115 },
1116 {
1117 .name = "instructions:G",
1118 .check = test__checkevent_exclude_host_modifier,
1119 },
1120 {
1121 .name = "instructions:H",
1122 .check = test__checkevent_exclude_guest_modifier,
1123 },
1124 };
1125
1126 #define TEST__EVENTS_CNT (sizeof(test__events) / sizeof(struct test__event_st))
1127
test__parse_events(void)1128 static int test__parse_events(void)
1129 {
1130 struct perf_evlist *evlist;
1131 u_int i;
1132 int ret = 0;
1133
1134 for (i = 0; i < TEST__EVENTS_CNT; i++) {
1135 struct test__event_st *e = &test__events[i];
1136
1137 evlist = perf_evlist__new(NULL, NULL);
1138 if (evlist == NULL)
1139 break;
1140
1141 ret = parse_events(evlist, e->name, 0);
1142 if (ret) {
1143 pr_debug("failed to parse event '%s', err %d\n",
1144 e->name, ret);
1145 break;
1146 }
1147
1148 ret = e->check(evlist);
1149 perf_evlist__delete(evlist);
1150 if (ret)
1151 break;
1152 }
1153
1154 return ret;
1155 }
1156
sched__get_first_possible_cpu(pid_t pid,cpu_set_t * maskp)1157 static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t *maskp)
1158 {
1159 int i, cpu = -1, nrcpus = 1024;
1160 realloc:
1161 CPU_ZERO(maskp);
1162
1163 if (sched_getaffinity(pid, sizeof(*maskp), maskp) == -1) {
1164 if (errno == EINVAL && nrcpus < (1024 << 8)) {
1165 nrcpus = nrcpus << 2;
1166 goto realloc;
1167 }
1168 perror("sched_getaffinity");
1169 return -1;
1170 }
1171
1172 for (i = 0; i < nrcpus; i++) {
1173 if (CPU_ISSET(i, maskp)) {
1174 if (cpu == -1)
1175 cpu = i;
1176 else
1177 CPU_CLR(i, maskp);
1178 }
1179 }
1180
1181 return cpu;
1182 }
1183
test__PERF_RECORD(void)1184 static int test__PERF_RECORD(void)
1185 {
1186 struct perf_record_opts opts = {
1187 .no_delay = true,
1188 .freq = 10,
1189 .mmap_pages = 256,
1190 };
1191 cpu_set_t cpu_mask;
1192 size_t cpu_mask_size = sizeof(cpu_mask);
1193 struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
1194 struct perf_evsel *evsel;
1195 struct perf_sample sample;
1196 const char *cmd = "sleep";
1197 const char *argv[] = { cmd, "1", NULL, };
1198 char *bname;
1199 u64 sample_type, prev_time = 0;
1200 bool found_cmd_mmap = false,
1201 found_libc_mmap = false,
1202 found_vdso_mmap = false,
1203 found_ld_mmap = false;
1204 int err = -1, errs = 0, i, wakeups = 0, sample_size;
1205 u32 cpu;
1206 int total_events = 0, nr_events[PERF_RECORD_MAX] = { 0, };
1207
1208 if (evlist == NULL || argv == NULL) {
1209 pr_debug("Not enough memory to create evlist\n");
1210 goto out;
1211 }
1212
1213 /*
1214 * We need at least one evsel in the evlist, use the default
1215 * one: "cycles".
1216 */
1217 err = perf_evlist__add_default(evlist);
1218 if (err < 0) {
1219 pr_debug("Not enough memory to create evsel\n");
1220 goto out_delete_evlist;
1221 }
1222
1223 /*
1224 * Create maps of threads and cpus to monitor. In this case
1225 * we start with all threads and cpus (-1, -1) but then in
1226 * perf_evlist__prepare_workload we'll fill in the only thread
1227 * we're monitoring, the one forked there.
1228 */
1229 err = perf_evlist__create_maps(evlist, opts.target_pid,
1230 opts.target_tid, UINT_MAX, opts.cpu_list);
1231 if (err < 0) {
1232 pr_debug("Not enough memory to create thread/cpu maps\n");
1233 goto out_delete_evlist;
1234 }
1235
1236 /*
1237 * Prepare the workload in argv[] to run, it'll fork it, and then wait
1238 * for perf_evlist__start_workload() to exec it. This is done this way
1239 * so that we have time to open the evlist (calling sys_perf_event_open
1240 * on all the fds) and then mmap them.
1241 */
1242 err = perf_evlist__prepare_workload(evlist, &opts, argv);
1243 if (err < 0) {
1244 pr_debug("Couldn't run the workload!\n");
1245 goto out_delete_evlist;
1246 }
1247
1248 /*
1249 * Config the evsels, setting attr->comm on the first one, etc.
1250 */
1251 evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
1252 evsel->attr.sample_type |= PERF_SAMPLE_CPU;
1253 evsel->attr.sample_type |= PERF_SAMPLE_TID;
1254 evsel->attr.sample_type |= PERF_SAMPLE_TIME;
1255 perf_evlist__config_attrs(evlist, &opts);
1256
1257 err = sched__get_first_possible_cpu(evlist->workload.pid, &cpu_mask);
1258 if (err < 0) {
1259 pr_debug("sched__get_first_possible_cpu: %s\n", strerror(errno));
1260 goto out_delete_evlist;
1261 }
1262
1263 cpu = err;
1264
1265 /*
1266 * So that we can check perf_sample.cpu on all the samples.
1267 */
1268 if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, &cpu_mask) < 0) {
1269 pr_debug("sched_setaffinity: %s\n", strerror(errno));
1270 goto out_delete_evlist;
1271 }
1272
1273 /*
1274 * Call sys_perf_event_open on all the fds on all the evsels,
1275 * grouping them if asked to.
1276 */
1277 err = perf_evlist__open(evlist, opts.group);
1278 if (err < 0) {
1279 pr_debug("perf_evlist__open: %s\n", strerror(errno));
1280 goto out_delete_evlist;
1281 }
1282
1283 /*
1284 * mmap the first fd on a given CPU and ask for events for the other
1285 * fds in the same CPU to be injected in the same mmap ring buffer
1286 * (using ioctl(PERF_EVENT_IOC_SET_OUTPUT)).
1287 */
1288 err = perf_evlist__mmap(evlist, opts.mmap_pages, false);
1289 if (err < 0) {
1290 pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
1291 goto out_delete_evlist;
1292 }
1293
1294 /*
1295 * We'll need these two to parse the PERF_SAMPLE_* fields in each
1296 * event.
1297 */
1298 sample_type = perf_evlist__sample_type(evlist);
1299 sample_size = __perf_evsel__sample_size(sample_type);
1300
1301 /*
1302 * Now that all is properly set up, enable the events, they will
1303 * count just on workload.pid, which will start...
1304 */
1305 perf_evlist__enable(evlist);
1306
1307 /*
1308 * Now!
1309 */
1310 perf_evlist__start_workload(evlist);
1311
1312 while (1) {
1313 int before = total_events;
1314
1315 for (i = 0; i < evlist->nr_mmaps; i++) {
1316 union perf_event *event;
1317
1318 while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
1319 const u32 type = event->header.type;
1320 const char *name = perf_event__name(type);
1321
1322 ++total_events;
1323 if (type < PERF_RECORD_MAX)
1324 nr_events[type]++;
1325
1326 err = perf_event__parse_sample(event, sample_type,
1327 sample_size, true,
1328 &sample, false);
1329 if (err < 0) {
1330 if (verbose)
1331 perf_event__fprintf(event, stderr);
1332 pr_debug("Couldn't parse sample\n");
1333 goto out_err;
1334 }
1335
1336 if (verbose) {
1337 pr_info("%" PRIu64" %d ", sample.time, sample.cpu);
1338 perf_event__fprintf(event, stderr);
1339 }
1340
1341 if (prev_time > sample.time) {
1342 pr_debug("%s going backwards in time, prev=%" PRIu64 ", curr=%" PRIu64 "\n",
1343 name, prev_time, sample.time);
1344 ++errs;
1345 }
1346
1347 prev_time = sample.time;
1348
1349 if (sample.cpu != cpu) {
1350 pr_debug("%s with unexpected cpu, expected %d, got %d\n",
1351 name, cpu, sample.cpu);
1352 ++errs;
1353 }
1354
1355 if ((pid_t)sample.pid != evlist->workload.pid) {
1356 pr_debug("%s with unexpected pid, expected %d, got %d\n",
1357 name, evlist->workload.pid, sample.pid);
1358 ++errs;
1359 }
1360
1361 if ((pid_t)sample.tid != evlist->workload.pid) {
1362 pr_debug("%s with unexpected tid, expected %d, got %d\n",
1363 name, evlist->workload.pid, sample.tid);
1364 ++errs;
1365 }
1366
1367 if ((type == PERF_RECORD_COMM ||
1368 type == PERF_RECORD_MMAP ||
1369 type == PERF_RECORD_FORK ||
1370 type == PERF_RECORD_EXIT) &&
1371 (pid_t)event->comm.pid != evlist->workload.pid) {
1372 pr_debug("%s with unexpected pid/tid\n", name);
1373 ++errs;
1374 }
1375
1376 if ((type == PERF_RECORD_COMM ||
1377 type == PERF_RECORD_MMAP) &&
1378 event->comm.pid != event->comm.tid) {
1379 pr_debug("%s with different pid/tid!\n", name);
1380 ++errs;
1381 }
1382
1383 switch (type) {
1384 case PERF_RECORD_COMM:
1385 if (strcmp(event->comm.comm, cmd)) {
1386 pr_debug("%s with unexpected comm!\n", name);
1387 ++errs;
1388 }
1389 break;
1390 case PERF_RECORD_EXIT:
1391 goto found_exit;
1392 case PERF_RECORD_MMAP:
1393 bname = strrchr(event->mmap.filename, '/');
1394 if (bname != NULL) {
1395 if (!found_cmd_mmap)
1396 found_cmd_mmap = !strcmp(bname + 1, cmd);
1397 if (!found_libc_mmap)
1398 found_libc_mmap = !strncmp(bname + 1, "libc", 4);
1399 if (!found_ld_mmap)
1400 found_ld_mmap = !strncmp(bname + 1, "ld", 2);
1401 } else if (!found_vdso_mmap)
1402 found_vdso_mmap = !strcmp(event->mmap.filename, "[vdso]");
1403 break;
1404
1405 case PERF_RECORD_SAMPLE:
1406 /* Just ignore samples for now */
1407 break;
1408 default:
1409 pr_debug("Unexpected perf_event->header.type %d!\n",
1410 type);
1411 ++errs;
1412 }
1413 }
1414 }
1415
1416 /*
1417 * We don't use poll here because at least at 3.1 times the
1418 * PERF_RECORD_{!SAMPLE} events don't honour
1419 * perf_event_attr.wakeup_events, just PERF_EVENT_SAMPLE does.
1420 */
1421 if (total_events == before && false)
1422 poll(evlist->pollfd, evlist->nr_fds, -1);
1423
1424 sleep(1);
1425 if (++wakeups > 5) {
1426 pr_debug("No PERF_RECORD_EXIT event!\n");
1427 break;
1428 }
1429 }
1430
1431 found_exit:
1432 if (nr_events[PERF_RECORD_COMM] > 1) {
1433 pr_debug("Excessive number of PERF_RECORD_COMM events!\n");
1434 ++errs;
1435 }
1436
1437 if (nr_events[PERF_RECORD_COMM] == 0) {
1438 pr_debug("Missing PERF_RECORD_COMM for %s!\n", cmd);
1439 ++errs;
1440 }
1441
1442 if (!found_cmd_mmap) {
1443 pr_debug("PERF_RECORD_MMAP for %s missing!\n", cmd);
1444 ++errs;
1445 }
1446
1447 if (!found_libc_mmap) {
1448 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "libc");
1449 ++errs;
1450 }
1451
1452 if (!found_ld_mmap) {
1453 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "ld");
1454 ++errs;
1455 }
1456
1457 if (!found_vdso_mmap) {
1458 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
1459 ++errs;
1460 }
1461 out_err:
1462 perf_evlist__munmap(evlist);
1463 out_delete_evlist:
1464 perf_evlist__delete(evlist);
1465 out:
1466 return (err < 0 || errs > 0) ? -1 : 0;
1467 }
1468
1469
1470 #if defined(__x86_64__) || defined(__i386__)
1471
1472 #define barrier() asm volatile("" ::: "memory")
1473
rdpmc(unsigned int counter)1474 static u64 rdpmc(unsigned int counter)
1475 {
1476 unsigned int low, high;
1477
1478 asm volatile("rdpmc" : "=a" (low), "=d" (high) : "c" (counter));
1479
1480 return low | ((u64)high) << 32;
1481 }
1482
rdtsc(void)1483 static u64 rdtsc(void)
1484 {
1485 unsigned int low, high;
1486
1487 asm volatile("rdtsc" : "=a" (low), "=d" (high));
1488
1489 return low | ((u64)high) << 32;
1490 }
1491
mmap_read_self(void * addr)1492 static u64 mmap_read_self(void *addr)
1493 {
1494 struct perf_event_mmap_page *pc = addr;
1495 u32 seq, idx, time_mult = 0, time_shift = 0;
1496 u64 count, cyc = 0, time_offset = 0, enabled, running, delta;
1497
1498 do {
1499 seq = pc->lock;
1500 barrier();
1501
1502 enabled = pc->time_enabled;
1503 running = pc->time_running;
1504
1505 if (enabled != running) {
1506 cyc = rdtsc();
1507 time_mult = pc->time_mult;
1508 time_shift = pc->time_shift;
1509 time_offset = pc->time_offset;
1510 }
1511
1512 idx = pc->index;
1513 count = pc->offset;
1514 if (idx)
1515 count += rdpmc(idx - 1);
1516
1517 barrier();
1518 } while (pc->lock != seq);
1519
1520 if (enabled != running) {
1521 u64 quot, rem;
1522
1523 quot = (cyc >> time_shift);
1524 rem = cyc & ((1 << time_shift) - 1);
1525 delta = time_offset + quot * time_mult +
1526 ((rem * time_mult) >> time_shift);
1527
1528 enabled += delta;
1529 if (idx)
1530 running += delta;
1531
1532 quot = count / running;
1533 rem = count % running;
1534 count = quot * enabled + (rem * enabled) / running;
1535 }
1536
1537 return count;
1538 }
1539
1540 /*
1541 * If the RDPMC instruction faults then signal this back to the test parent task:
1542 */
segfault_handler(int sig __used,siginfo_t * info __used,void * uc __used)1543 static void segfault_handler(int sig __used, siginfo_t *info __used, void *uc __used)
1544 {
1545 exit(-1);
1546 }
1547
__test__rdpmc(void)1548 static int __test__rdpmc(void)
1549 {
1550 long page_size = sysconf(_SC_PAGE_SIZE);
1551 volatile int tmp = 0;
1552 u64 i, loops = 1000;
1553 int n;
1554 int fd;
1555 void *addr;
1556 struct perf_event_attr attr = {
1557 .type = PERF_TYPE_HARDWARE,
1558 .config = PERF_COUNT_HW_INSTRUCTIONS,
1559 .exclude_kernel = 1,
1560 };
1561 u64 delta_sum = 0;
1562 struct sigaction sa;
1563
1564 sigfillset(&sa.sa_mask);
1565 sa.sa_sigaction = segfault_handler;
1566 sigaction(SIGSEGV, &sa, NULL);
1567
1568 fprintf(stderr, "\n\n");
1569
1570 fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
1571 if (fd < 0) {
1572 die("Error: sys_perf_event_open() syscall returned "
1573 "with %d (%s)\n", fd, strerror(errno));
1574 }
1575
1576 addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, 0);
1577 if (addr == (void *)(-1)) {
1578 die("Error: mmap() syscall returned "
1579 "with (%s)\n", strerror(errno));
1580 }
1581
1582 for (n = 0; n < 6; n++) {
1583 u64 stamp, now, delta;
1584
1585 stamp = mmap_read_self(addr);
1586
1587 for (i = 0; i < loops; i++)
1588 tmp++;
1589
1590 now = mmap_read_self(addr);
1591 loops *= 10;
1592
1593 delta = now - stamp;
1594 fprintf(stderr, "%14d: %14Lu\n", n, (long long)delta);
1595
1596 delta_sum += delta;
1597 }
1598
1599 munmap(addr, page_size);
1600 close(fd);
1601
1602 fprintf(stderr, " ");
1603
1604 if (!delta_sum)
1605 return -1;
1606
1607 return 0;
1608 }
1609
test__rdpmc(void)1610 static int test__rdpmc(void)
1611 {
1612 int status = 0;
1613 int wret = 0;
1614 int ret;
1615 int pid;
1616
1617 pid = fork();
1618 if (pid < 0)
1619 return -1;
1620
1621 if (!pid) {
1622 ret = __test__rdpmc();
1623
1624 exit(ret);
1625 }
1626
1627 wret = waitpid(pid, &status, 0);
1628 if (wret < 0 || status)
1629 return -1;
1630
1631 return 0;
1632 }
1633
1634 #endif
1635
test__perf_pmu(void)1636 static int test__perf_pmu(void)
1637 {
1638 return perf_pmu__test();
1639 }
1640
1641 static struct test {
1642 const char *desc;
1643 int (*func)(void);
1644 } tests[] = {
1645 {
1646 .desc = "vmlinux symtab matches kallsyms",
1647 .func = test__vmlinux_matches_kallsyms,
1648 },
1649 {
1650 .desc = "detect open syscall event",
1651 .func = test__open_syscall_event,
1652 },
1653 {
1654 .desc = "detect open syscall event on all cpus",
1655 .func = test__open_syscall_event_on_all_cpus,
1656 },
1657 {
1658 .desc = "read samples using the mmap interface",
1659 .func = test__basic_mmap,
1660 },
1661 {
1662 .desc = "parse events tests",
1663 .func = test__parse_events,
1664 },
1665 #if defined(__x86_64__) || defined(__i386__)
1666 {
1667 .desc = "x86 rdpmc test",
1668 .func = test__rdpmc,
1669 },
1670 #endif
1671 {
1672 .desc = "Validate PERF_RECORD_* events & perf_sample fields",
1673 .func = test__PERF_RECORD,
1674 },
1675 {
1676 .desc = "Test perf pmu format parsing",
1677 .func = test__perf_pmu,
1678 },
1679 {
1680 .func = NULL,
1681 },
1682 };
1683
perf_test__matches(int curr,int argc,const char * argv[])1684 static bool perf_test__matches(int curr, int argc, const char *argv[])
1685 {
1686 int i;
1687
1688 if (argc == 0)
1689 return true;
1690
1691 for (i = 0; i < argc; ++i) {
1692 char *end;
1693 long nr = strtoul(argv[i], &end, 10);
1694
1695 if (*end == '\0') {
1696 if (nr == curr + 1)
1697 return true;
1698 continue;
1699 }
1700
1701 if (strstr(tests[curr].desc, argv[i]))
1702 return true;
1703 }
1704
1705 return false;
1706 }
1707
__cmd_test(int argc,const char * argv[])1708 static int __cmd_test(int argc, const char *argv[])
1709 {
1710 int i = 0;
1711
1712 while (tests[i].func) {
1713 int curr = i++, err;
1714
1715 if (!perf_test__matches(curr, argc, argv))
1716 continue;
1717
1718 pr_info("%2d: %s:", i, tests[curr].desc);
1719 pr_debug("\n--- start ---\n");
1720 err = tests[curr].func();
1721 pr_debug("---- end ----\n%s:", tests[curr].desc);
1722 pr_info(" %s\n", err ? "FAILED!\n" : "Ok");
1723 }
1724
1725 return 0;
1726 }
1727
perf_test__list(int argc,const char ** argv)1728 static int perf_test__list(int argc, const char **argv)
1729 {
1730 int i = 0;
1731
1732 while (tests[i].func) {
1733 int curr = i++;
1734
1735 if (argc > 1 && !strstr(tests[curr].desc, argv[1]))
1736 continue;
1737
1738 pr_info("%2d: %s\n", i, tests[curr].desc);
1739 }
1740
1741 return 0;
1742 }
1743
cmd_test(int argc,const char ** argv,const char * prefix __used)1744 int cmd_test(int argc, const char **argv, const char *prefix __used)
1745 {
1746 const char * const test_usage[] = {
1747 "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
1748 NULL,
1749 };
1750 const struct option test_options[] = {
1751 OPT_INCR('v', "verbose", &verbose,
1752 "be more verbose (show symbol address, etc)"),
1753 OPT_END()
1754 };
1755
1756 argc = parse_options(argc, argv, test_options, test_usage, 0);
1757 if (argc >= 1 && !strcmp(argv[0], "list"))
1758 return perf_test__list(argc, argv);
1759
1760 symbol_conf.priv_size = sizeof(int);
1761 symbol_conf.sort_by_name = true;
1762 symbol_conf.try_vmlinux_path = true;
1763
1764 if (symbol__init() < 0)
1765 return -1;
1766
1767 return __cmd_test(argc, argv);
1768 }
1769