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-rw-r--r--tools/perf/builtin-test.c919
1 files changed, 919 insertions, 0 deletions
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
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+++ b/tools/perf/builtin-test.c
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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/evlist.h"
11#include "util/parse-options.h"
12#include "util/parse-events.h"
13#include "util/symbol.h"
14#include "util/thread_map.h"
15#include "../../include/linux/hw_breakpoint.h"
16
17static long page_size;
18
19static int vmlinux_matches_kallsyms_filter(struct map *map __used, struct symbol *sym)
20{
21 bool *visited = symbol__priv(sym);
22 *visited = true;
23 return 0;
24}
25
26static int test__vmlinux_matches_kallsyms(void)
27{
28 int err = -1;
29 struct rb_node *nd;
30 struct symbol *sym;
31 struct map *kallsyms_map, *vmlinux_map;
32 struct machine kallsyms, vmlinux;
33 enum map_type type = MAP__FUNCTION;
34 struct ref_reloc_sym ref_reloc_sym = { .name = "_stext", };
35
36 /*
37 * Step 1:
38 *
39 * Init the machines that will hold kernel, modules obtained from
40 * both vmlinux + .ko files and from /proc/kallsyms split by modules.
41 */
42 machine__init(&kallsyms, "", HOST_KERNEL_ID);
43 machine__init(&vmlinux, "", HOST_KERNEL_ID);
44
45 /*
46 * Step 2:
47 *
48 * Create the kernel maps for kallsyms and the DSO where we will then
49 * load /proc/kallsyms. Also create the modules maps from /proc/modules
50 * and find the .ko files that match them in /lib/modules/`uname -r`/.
51 */
52 if (machine__create_kernel_maps(&kallsyms) < 0) {
53 pr_debug("machine__create_kernel_maps ");
54 return -1;
55 }
56
57 /*
58 * Step 3:
59 *
60 * Load and split /proc/kallsyms into multiple maps, one per module.
61 */
62 if (machine__load_kallsyms(&kallsyms, "/proc/kallsyms", type, NULL) <= 0) {
63 pr_debug("dso__load_kallsyms ");
64 goto out;
65 }
66
67 /*
68 * Step 4:
69 *
70 * kallsyms will be internally on demand sorted by name so that we can
71 * find the reference relocation * symbol, i.e. the symbol we will use
72 * to see if the running kernel was relocated by checking if it has the
73 * same value in the vmlinux file we load.
74 */
75 kallsyms_map = machine__kernel_map(&kallsyms, type);
76
77 sym = map__find_symbol_by_name(kallsyms_map, ref_reloc_sym.name, NULL);
78 if (sym == NULL) {
79 pr_debug("dso__find_symbol_by_name ");
80 goto out;
81 }
82
83 ref_reloc_sym.addr = sym->start;
84
85 /*
86 * Step 5:
87 *
88 * Now repeat step 2, this time for the vmlinux file we'll auto-locate.
89 */
90 if (machine__create_kernel_maps(&vmlinux) < 0) {
91 pr_debug("machine__create_kernel_maps ");
92 goto out;
93 }
94
95 vmlinux_map = machine__kernel_map(&vmlinux, type);
96 map__kmap(vmlinux_map)->ref_reloc_sym = &ref_reloc_sym;
97
98 /*
99 * Step 6:
100 *
101 * Locate a vmlinux file in the vmlinux path that has a buildid that
102 * matches the one of the running kernel.
103 *
104 * While doing that look if we find the ref reloc symbol, if we find it
105 * we'll have its ref_reloc_symbol.unrelocated_addr and then
106 * maps__reloc_vmlinux will notice and set proper ->[un]map_ip routines
107 * to fixup the symbols.
108 */
109 if (machine__load_vmlinux_path(&vmlinux, type,
110 vmlinux_matches_kallsyms_filter) <= 0) {
111 pr_debug("machine__load_vmlinux_path ");
112 goto out;
113 }
114
115 err = 0;
116 /*
117 * Step 7:
118 *
119 * Now look at the symbols in the vmlinux DSO and check if we find all of them
120 * in the kallsyms dso. For the ones that are in both, check its names and
121 * end addresses too.
122 */
123 for (nd = rb_first(&vmlinux_map->dso->symbols[type]); nd; nd = rb_next(nd)) {
124 struct symbol *pair, *first_pair;
125 bool backwards = true;
126
127 sym = rb_entry(nd, struct symbol, rb_node);
128
129 if (sym->start == sym->end)
130 continue;
131
132 first_pair = machine__find_kernel_symbol(&kallsyms, type, sym->start, NULL, NULL);
133 pair = first_pair;
134
135 if (pair && pair->start == sym->start) {
136next_pair:
137 if (strcmp(sym->name, pair->name) == 0) {
138 /*
139 * kallsyms don't have the symbol end, so we
140 * set that by using the next symbol start - 1,
141 * in some cases we get this up to a page
142 * wrong, trace_kmalloc when I was developing
143 * this code was one such example, 2106 bytes
144 * off the real size. More than that and we
145 * _really_ have a problem.
146 */
147 s64 skew = sym->end - pair->end;
148 if (llabs(skew) < page_size)
149 continue;
150
151 pr_debug("%#" PRIx64 ": diff end addr for %s v: %#" PRIx64 " k: %#" PRIx64 "\n",
152 sym->start, sym->name, sym->end, pair->end);
153 } else {
154 struct rb_node *nnd;
155detour:
156 nnd = backwards ? rb_prev(&pair->rb_node) :
157 rb_next(&pair->rb_node);
158 if (nnd) {
159 struct symbol *next = rb_entry(nnd, struct symbol, rb_node);
160
161 if (next->start == sym->start) {
162 pair = next;
163 goto next_pair;
164 }
165 }
166
167 if (backwards) {
168 backwards = false;
169 pair = first_pair;
170 goto detour;
171 }
172
173 pr_debug("%#" PRIx64 ": diff name v: %s k: %s\n",
174 sym->start, sym->name, pair->name);
175 }
176 } else
177 pr_debug("%#" PRIx64 ": %s not on kallsyms\n", sym->start, sym->name);
178
179 err = -1;
180 }
181
182 if (!verbose)
183 goto out;
184
185 pr_info("Maps only in vmlinux:\n");
186
187 for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
188 struct map *pos = rb_entry(nd, struct map, rb_node), *pair;
189 /*
190 * If it is the kernel, kallsyms is always "[kernel.kallsyms]", while
191 * the kernel will have the path for the vmlinux file being used,
192 * so use the short name, less descriptive but the same ("[kernel]" in
193 * both cases.
194 */
195 pair = map_groups__find_by_name(&kallsyms.kmaps, type,
196 (pos->dso->kernel ?
197 pos->dso->short_name :
198 pos->dso->name));
199 if (pair)
200 pair->priv = 1;
201 else
202 map__fprintf(pos, stderr);
203 }
204
205 pr_info("Maps in vmlinux with a different name in kallsyms:\n");
206
207 for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
208 struct map *pos = rb_entry(nd, struct map, rb_node), *pair;
209
210 pair = map_groups__find(&kallsyms.kmaps, type, pos->start);
211 if (pair == NULL || pair->priv)
212 continue;
213
214 if (pair->start == pos->start) {
215 pair->priv = 1;
216 pr_info(" %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s in kallsyms as",
217 pos->start, pos->end, pos->pgoff, pos->dso->name);
218 if (pos->pgoff != pair->pgoff || pos->end != pair->end)
219 pr_info(": \n*%" PRIx64 "-%" PRIx64 " %" PRIx64 "",
220 pair->start, pair->end, pair->pgoff);
221 pr_info(" %s\n", pair->dso->name);
222 pair->priv = 1;
223 }
224 }
225
226 pr_info("Maps only in kallsyms:\n");
227
228 for (nd = rb_first(&kallsyms.kmaps.maps[type]);
229 nd; nd = rb_next(nd)) {
230 struct map *pos = rb_entry(nd, struct map, rb_node);
231
232 if (!pos->priv)
233 map__fprintf(pos, stderr);
234 }
235out:
236 return err;
237}
238
239#include "util/cpumap.h"
240#include "util/evsel.h"
241#include <sys/types.h>
242
243static int trace_event__id(const char *evname)
244{
245 char *filename;
246 int err = -1, fd;
247
248 if (asprintf(&filename,
249 "%s/syscalls/%s/id",
250 debugfs_path, evname) < 0)
251 return -1;
252
253 fd = open(filename, O_RDONLY);
254 if (fd >= 0) {
255 char id[16];
256 if (read(fd, id, sizeof(id)) > 0)
257 err = atoi(id);
258 close(fd);
259 }
260
261 free(filename);
262 return err;
263}
264
265static int test__open_syscall_event(void)
266{
267 int err = -1, fd;
268 struct thread_map *threads;
269 struct perf_evsel *evsel;
270 struct perf_event_attr attr;
271 unsigned int nr_open_calls = 111, i;
272 int id = trace_event__id("sys_enter_open");
273
274 if (id < 0) {
275 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
276 return -1;
277 }
278
279 threads = thread_map__new(-1, getpid());
280 if (threads == NULL) {
281 pr_debug("thread_map__new\n");
282 return -1;
283 }
284
285 memset(&attr, 0, sizeof(attr));
286 attr.type = PERF_TYPE_TRACEPOINT;
287 attr.config = id;
288 evsel = perf_evsel__new(&attr, 0);
289 if (evsel == NULL) {
290 pr_debug("perf_evsel__new\n");
291 goto out_thread_map_delete;
292 }
293
294 if (perf_evsel__open_per_thread(evsel, threads, false) < 0) {
295 pr_debug("failed to open counter: %s, "
296 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
297 strerror(errno));
298 goto out_evsel_delete;
299 }
300
301 for (i = 0; i < nr_open_calls; ++i) {
302 fd = open("/etc/passwd", O_RDONLY);
303 close(fd);
304 }
305
306 if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
307 pr_debug("perf_evsel__read_on_cpu\n");
308 goto out_close_fd;
309 }
310
311 if (evsel->counts->cpu[0].val != nr_open_calls) {
312 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
313 nr_open_calls, evsel->counts->cpu[0].val);
314 goto out_close_fd;
315 }
316
317 err = 0;
318out_close_fd:
319 perf_evsel__close_fd(evsel, 1, threads->nr);
320out_evsel_delete:
321 perf_evsel__delete(evsel);
322out_thread_map_delete:
323 thread_map__delete(threads);
324 return err;
325}
326
327#include <sched.h>
328
329static int test__open_syscall_event_on_all_cpus(void)
330{
331 int err = -1, fd, cpu;
332 struct thread_map *threads;
333 struct cpu_map *cpus;
334 struct perf_evsel *evsel;
335 struct perf_event_attr attr;
336 unsigned int nr_open_calls = 111, i;
337 cpu_set_t cpu_set;
338 int id = trace_event__id("sys_enter_open");
339
340 if (id < 0) {
341 pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
342 return -1;
343 }
344
345 threads = thread_map__new(-1, getpid());
346 if (threads == NULL) {
347 pr_debug("thread_map__new\n");
348 return -1;
349 }
350
351 cpus = cpu_map__new(NULL);
352 if (cpus == NULL) {
353 pr_debug("cpu_map__new\n");
354 goto out_thread_map_delete;
355 }
356
357
358 CPU_ZERO(&cpu_set);
359
360 memset(&attr, 0, sizeof(attr));
361 attr.type = PERF_TYPE_TRACEPOINT;
362 attr.config = id;
363 evsel = perf_evsel__new(&attr, 0);
364 if (evsel == NULL) {
365 pr_debug("perf_evsel__new\n");
366 goto out_thread_map_delete;
367 }
368
369 if (perf_evsel__open(evsel, cpus, threads, false) < 0) {
370 pr_debug("failed to open counter: %s, "
371 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
372 strerror(errno));
373 goto out_evsel_delete;
374 }
375
376 for (cpu = 0; cpu < cpus->nr; ++cpu) {
377 unsigned int ncalls = nr_open_calls + cpu;
378 /*
379 * XXX eventually lift this restriction in a way that
380 * keeps perf building on older glibc installations
381 * without CPU_ALLOC. 1024 cpus in 2010 still seems
382 * a reasonable upper limit tho :-)
383 */
384 if (cpus->map[cpu] >= CPU_SETSIZE) {
385 pr_debug("Ignoring CPU %d\n", cpus->map[cpu]);
386 continue;
387 }
388
389 CPU_SET(cpus->map[cpu], &cpu_set);
390 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
391 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
392 cpus->map[cpu],
393 strerror(errno));
394 goto out_close_fd;
395 }
396 for (i = 0; i < ncalls; ++i) {
397 fd = open("/etc/passwd", O_RDONLY);
398 close(fd);
399 }
400 CPU_CLR(cpus->map[cpu], &cpu_set);
401 }
402
403 /*
404 * Here we need to explicitely preallocate the counts, as if
405 * we use the auto allocation it will allocate just for 1 cpu,
406 * as we start by cpu 0.
407 */
408 if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) {
409 pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr);
410 goto out_close_fd;
411 }
412
413 err = 0;
414
415 for (cpu = 0; cpu < cpus->nr; ++cpu) {
416 unsigned int expected;
417
418 if (cpus->map[cpu] >= CPU_SETSIZE)
419 continue;
420
421 if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) {
422 pr_debug("perf_evsel__read_on_cpu\n");
423 err = -1;
424 break;
425 }
426
427 expected = nr_open_calls + cpu;
428 if (evsel->counts->cpu[cpu].val != expected) {
429 pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
430 expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
431 err = -1;
432 }
433 }
434
435out_close_fd:
436 perf_evsel__close_fd(evsel, 1, threads->nr);
437out_evsel_delete:
438 perf_evsel__delete(evsel);
439out_thread_map_delete:
440 thread_map__delete(threads);
441 return err;
442}
443
444/*
445 * This test will generate random numbers of calls to some getpid syscalls,
446 * then establish an mmap for a group of events that are created to monitor
447 * the syscalls.
448 *
449 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
450 * sample.id field to map back to its respective perf_evsel instance.
451 *
452 * Then it checks if the number of syscalls reported as perf events by
453 * the kernel corresponds to the number of syscalls made.
454 */
455static int test__basic_mmap(void)
456{
457 int err = -1;
458 union perf_event *event;
459 struct thread_map *threads;
460 struct cpu_map *cpus;
461 struct perf_evlist *evlist;
462 struct perf_event_attr attr = {
463 .type = PERF_TYPE_TRACEPOINT,
464 .read_format = PERF_FORMAT_ID,
465 .sample_type = PERF_SAMPLE_ID,
466 .watermark = 0,
467 };
468 cpu_set_t cpu_set;
469 const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
470 "getpgid", };
471 pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
472 (void*)getpgid };
473#define nsyscalls ARRAY_SIZE(syscall_names)
474 int ids[nsyscalls];
475 unsigned int nr_events[nsyscalls],
476 expected_nr_events[nsyscalls], i, j;
477 struct perf_evsel *evsels[nsyscalls], *evsel;
478 int sample_size = __perf_evsel__sample_size(attr.sample_type);
479
480 for (i = 0; i < nsyscalls; ++i) {
481 char name[64];
482
483 snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
484 ids[i] = trace_event__id(name);
485 if (ids[i] < 0) {
486 pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");
487 return -1;
488 }
489 nr_events[i] = 0;
490 expected_nr_events[i] = random() % 257;
491 }
492
493 threads = thread_map__new(-1, getpid());
494 if (threads == NULL) {
495 pr_debug("thread_map__new\n");
496 return -1;
497 }
498
499 cpus = cpu_map__new(NULL);
500 if (cpus == NULL) {
501 pr_debug("cpu_map__new\n");
502 goto out_free_threads;
503 }
504
505 CPU_ZERO(&cpu_set);
506 CPU_SET(cpus->map[0], &cpu_set);
507 sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
508 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
509 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
510 cpus->map[0], strerror(errno));
511 goto out_free_cpus;
512 }
513
514 evlist = perf_evlist__new(cpus, threads);
515 if (evlist == NULL) {
516 pr_debug("perf_evlist__new\n");
517 goto out_free_cpus;
518 }
519
520 /* anonymous union fields, can't be initialized above */
521 attr.wakeup_events = 1;
522 attr.sample_period = 1;
523
524 for (i = 0; i < nsyscalls; ++i) {
525 attr.config = ids[i];
526 evsels[i] = perf_evsel__new(&attr, i);
527 if (evsels[i] == NULL) {
528 pr_debug("perf_evsel__new\n");
529 goto out_free_evlist;
530 }
531
532 perf_evlist__add(evlist, evsels[i]);
533
534 if (perf_evsel__open(evsels[i], cpus, threads, false) < 0) {
535 pr_debug("failed to open counter: %s, "
536 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
537 strerror(errno));
538 goto out_close_fd;
539 }
540 }
541
542 if (perf_evlist__mmap(evlist, 128, true) < 0) {
543 pr_debug("failed to mmap events: %d (%s)\n", errno,
544 strerror(errno));
545 goto out_close_fd;
546 }
547
548 for (i = 0; i < nsyscalls; ++i)
549 for (j = 0; j < expected_nr_events[i]; ++j) {
550 int foo = syscalls[i]();
551 ++foo;
552 }
553
554 while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
555 struct perf_sample sample;
556
557 if (event->header.type != PERF_RECORD_SAMPLE) {
558 pr_debug("unexpected %s event\n",
559 perf_event__name(event->header.type));
560 goto out_munmap;
561 }
562
563 err = perf_event__parse_sample(event, attr.sample_type, sample_size,
564 false, &sample, false);
565 if (err) {
566 pr_err("Can't parse sample, err = %d\n", err);
567 goto out_munmap;
568 }
569
570 evsel = perf_evlist__id2evsel(evlist, sample.id);
571 if (evsel == NULL) {
572 pr_debug("event with id %" PRIu64
573 " doesn't map to an evsel\n", sample.id);
574 goto out_munmap;
575 }
576 nr_events[evsel->idx]++;
577 }
578
579 list_for_each_entry(evsel, &evlist->entries, node) {
580 if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
581 pr_debug("expected %d %s events, got %d\n",
582 expected_nr_events[evsel->idx],
583 event_name(evsel), nr_events[evsel->idx]);
584 goto out_munmap;
585 }
586 }
587
588 err = 0;
589out_munmap:
590 perf_evlist__munmap(evlist);
591out_close_fd:
592 for (i = 0; i < nsyscalls; ++i)
593 perf_evsel__close_fd(evsels[i], 1, threads->nr);
594out_free_evlist:
595 perf_evlist__delete(evlist);
596out_free_cpus:
597 cpu_map__delete(cpus);
598out_free_threads:
599 thread_map__delete(threads);
600 return err;
601#undef nsyscalls
602}
603
604#define TEST_ASSERT_VAL(text, cond) \
605do { \
606 if (!cond) { \
607 pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
608 return -1; \
609 } \
610} while (0)
611
612static int test__checkevent_tracepoint(struct perf_evlist *evlist)
613{
614 struct perf_evsel *evsel = list_entry(evlist->entries.next,
615 struct perf_evsel, node);
616
617 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
618 TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
619 TEST_ASSERT_VAL("wrong sample_type",
620 (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU) ==
621 evsel->attr.sample_type);
622 TEST_ASSERT_VAL("wrong sample_period", 1 == evsel->attr.sample_period);
623 return 0;
624}
625
626static int test__checkevent_tracepoint_multi(struct perf_evlist *evlist)
627{
628 struct perf_evsel *evsel;
629
630 TEST_ASSERT_VAL("wrong number of entries", evlist->nr_entries > 1);
631
632 list_for_each_entry(evsel, &evlist->entries, node) {
633 TEST_ASSERT_VAL("wrong type",
634 PERF_TYPE_TRACEPOINT == evsel->attr.type);
635 TEST_ASSERT_VAL("wrong sample_type",
636 (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU)
637 == evsel->attr.sample_type);
638 TEST_ASSERT_VAL("wrong sample_period",
639 1 == evsel->attr.sample_period);
640 }
641 return 0;
642}
643
644static int test__checkevent_raw(struct perf_evlist *evlist)
645{
646 struct perf_evsel *evsel = list_entry(evlist->entries.next,
647 struct perf_evsel, node);
648
649 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
650 TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
651 TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
652 return 0;
653}
654
655static int test__checkevent_numeric(struct perf_evlist *evlist)
656{
657 struct perf_evsel *evsel = list_entry(evlist->entries.next,
658 struct perf_evsel, node);
659
660 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
661 TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
662 TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
663 return 0;
664}
665
666static int test__checkevent_symbolic_name(struct perf_evlist *evlist)
667{
668 struct perf_evsel *evsel = list_entry(evlist->entries.next,
669 struct perf_evsel, node);
670
671 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
672 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
673 TEST_ASSERT_VAL("wrong config",
674 PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
675 return 0;
676}
677
678static int test__checkevent_symbolic_alias(struct perf_evlist *evlist)
679{
680 struct perf_evsel *evsel = list_entry(evlist->entries.next,
681 struct perf_evsel, node);
682
683 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
684 TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->attr.type);
685 TEST_ASSERT_VAL("wrong config",
686 PERF_COUNT_SW_PAGE_FAULTS == evsel->attr.config);
687 return 0;
688}
689
690static int test__checkevent_genhw(struct perf_evlist *evlist)
691{
692 struct perf_evsel *evsel = list_entry(evlist->entries.next,
693 struct perf_evsel, node);
694
695 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
696 TEST_ASSERT_VAL("wrong type", PERF_TYPE_HW_CACHE == evsel->attr.type);
697 TEST_ASSERT_VAL("wrong config", (1 << 16) == evsel->attr.config);
698 return 0;
699}
700
701static int test__checkevent_breakpoint(struct perf_evlist *evlist)
702{
703 struct perf_evsel *evsel = list_entry(evlist->entries.next,
704 struct perf_evsel, node);
705
706 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
707 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
708 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
709 TEST_ASSERT_VAL("wrong bp_type", (HW_BREAKPOINT_R | HW_BREAKPOINT_W) ==
710 evsel->attr.bp_type);
711 TEST_ASSERT_VAL("wrong bp_len", HW_BREAKPOINT_LEN_4 ==
712 evsel->attr.bp_len);
713 return 0;
714}
715
716static int test__checkevent_breakpoint_x(struct perf_evlist *evlist)
717{
718 struct perf_evsel *evsel = list_entry(evlist->entries.next,
719 struct perf_evsel, node);
720
721 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
722 TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
723 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
724 TEST_ASSERT_VAL("wrong bp_type",
725 HW_BREAKPOINT_X == evsel->attr.bp_type);
726 TEST_ASSERT_VAL("wrong bp_len", sizeof(long) == evsel->attr.bp_len);
727 return 0;
728}
729
730static int test__checkevent_breakpoint_r(struct perf_evlist *evlist)
731{
732 struct perf_evsel *evsel = list_entry(evlist->entries.next,
733 struct perf_evsel, node);
734
735 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
736 TEST_ASSERT_VAL("wrong type",
737 PERF_TYPE_BREAKPOINT == evsel->attr.type);
738 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
739 TEST_ASSERT_VAL("wrong bp_type",
740 HW_BREAKPOINT_R == evsel->attr.bp_type);
741 TEST_ASSERT_VAL("wrong bp_len",
742 HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
743 return 0;
744}
745
746static int test__checkevent_breakpoint_w(struct perf_evlist *evlist)
747{
748 struct perf_evsel *evsel = list_entry(evlist->entries.next,
749 struct perf_evsel, node);
750
751 TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
752 TEST_ASSERT_VAL("wrong type",
753 PERF_TYPE_BREAKPOINT == evsel->attr.type);
754 TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
755 TEST_ASSERT_VAL("wrong bp_type",
756 HW_BREAKPOINT_W == evsel->attr.bp_type);
757 TEST_ASSERT_VAL("wrong bp_len",
758 HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
759 return 0;
760}
761
762static struct test__event_st {
763 const char *name;
764 __u32 type;
765 int (*check)(struct perf_evlist *evlist);
766} test__events[] = {
767 {
768 .name = "syscalls:sys_enter_open",
769 .check = test__checkevent_tracepoint,
770 },
771 {
772 .name = "syscalls:*",
773 .check = test__checkevent_tracepoint_multi,
774 },
775 {
776 .name = "r1",
777 .check = test__checkevent_raw,
778 },
779 {
780 .name = "1:1",
781 .check = test__checkevent_numeric,
782 },
783 {
784 .name = "instructions",
785 .check = test__checkevent_symbolic_name,
786 },
787 {
788 .name = "faults",
789 .check = test__checkevent_symbolic_alias,
790 },
791 {
792 .name = "L1-dcache-load-miss",
793 .check = test__checkevent_genhw,
794 },
795 {
796 .name = "mem:0",
797 .check = test__checkevent_breakpoint,
798 },
799 {
800 .name = "mem:0:x",
801 .check = test__checkevent_breakpoint_x,
802 },
803 {
804 .name = "mem:0:r",
805 .check = test__checkevent_breakpoint_r,
806 },
807 {
808 .name = "mem:0:w",
809 .check = test__checkevent_breakpoint_w,
810 },
811};
812
813#define TEST__EVENTS_CNT (sizeof(test__events) / sizeof(struct test__event_st))
814
815static int test__parse_events(void)
816{
817 struct perf_evlist *evlist;
818 u_int i;
819 int ret = 0;
820
821 for (i = 0; i < TEST__EVENTS_CNT; i++) {
822 struct test__event_st *e = &test__events[i];
823
824 evlist = perf_evlist__new(NULL, NULL);
825 if (evlist == NULL)
826 break;
827
828 ret = parse_events(evlist, e->name, 0);
829 if (ret) {
830 pr_debug("failed to parse event '%s', err %d\n",
831 e->name, ret);
832 break;
833 }
834
835 ret = e->check(evlist);
836 if (ret)
837 break;
838
839 perf_evlist__delete(evlist);
840 }
841
842 return ret;
843}
844static struct test {
845 const char *desc;
846 int (*func)(void);
847} tests[] = {
848 {
849 .desc = "vmlinux symtab matches kallsyms",
850 .func = test__vmlinux_matches_kallsyms,
851 },
852 {
853 .desc = "detect open syscall event",
854 .func = test__open_syscall_event,
855 },
856 {
857 .desc = "detect open syscall event on all cpus",
858 .func = test__open_syscall_event_on_all_cpus,
859 },
860 {
861 .desc = "read samples using the mmap interface",
862 .func = test__basic_mmap,
863 },
864 {
865 .desc = "parse events tests",
866 .func = test__parse_events,
867 },
868 {
869 .func = NULL,
870 },
871};
872
873static int __cmd_test(void)
874{
875 int i = 0;
876
877 page_size = sysconf(_SC_PAGE_SIZE);
878
879 while (tests[i].func) {
880 int err;
881 pr_info("%2d: %s:", i + 1, tests[i].desc);
882 pr_debug("\n--- start ---\n");
883 err = tests[i].func();
884 pr_debug("---- end ----\n%s:", tests[i].desc);
885 pr_info(" %s\n", err ? "FAILED!\n" : "Ok");
886 ++i;
887 }
888
889 return 0;
890}
891
892static const char * const test_usage[] = {
893 "perf test [<options>]",
894 NULL,
895};
896
897static const struct option test_options[] = {
898 OPT_INTEGER('v', "verbose", &verbose,
899 "be more verbose (show symbol address, etc)"),
900 OPT_END()
901};
902
903int cmd_test(int argc, const char **argv, const char *prefix __used)
904{
905 argc = parse_options(argc, argv, test_options, test_usage, 0);
906 if (argc)
907 usage_with_options(test_usage, test_options);
908
909 symbol_conf.priv_size = sizeof(int);
910 symbol_conf.sort_by_name = true;
911 symbol_conf.try_vmlinux_path = true;
912
913 if (symbol__init() < 0)
914 return -1;
915
916 setup_pager();
917
918 return __cmd_test();
919}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-28 21:40:15 -0400