tools/perf/builtin-test.c

   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 "../../include/linux/hw_breakpoint.h"
  17
  18 static int vmlinux_matches_kallsyms_filter(struct map *map __used, struct symbol *sym)
  19 {
  20         bool *visited = symbol__priv(sym);
  21         *visited = true;
  22         return 0;
  23 }
  24
  25 static int test__vmlinux_matches_kallsyms(void)
  26 {
  27         int err = -1;
  28         struct rb_node *nd;
  29         struct symbol *sym;
  30         struct map *kallsyms_map, *vmlinux_map;
  31         struct machine kallsyms, vmlinux;
  32         enum map_type type = MAP__FUNCTION;
  33         long page_size = sysconf(_SC_PAGE_SIZE);
  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) {
 136 next_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;
 155 detour:
 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         }
 235 out:
 236         return err;
 237 }
 238
 239 #include "util/cpumap.h"
 240 #include "util/evsel.h"
 241 #include <sys/types.h>
 242
 243 static 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                      tracing_events_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
 265 static 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, NULL) < 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;
 318 out_close_fd:
 319         perf_evsel__close_fd(evsel, 1, threads->nr);
 320 out_evsel_delete:
 321         perf_evsel__delete(evsel);
 322 out_thread_map_delete:
 323         thread_map__delete(threads);
 324         return err;
 325 }
 326
 327 #include <sched.h>
 328
 329 static 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, NULL) < 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
 435 out_close_fd:
 436         perf_evsel__close_fd(evsel, 1, threads->nr);
 437 out_evsel_delete:
 438         perf_evsel__delete(evsel);
 439 out_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  */
 455 static 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, NULL) < 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;
 589 out_munmap:
 590         perf_evlist__munmap(evlist);
 591 out_close_fd:
 592         for (i = 0; i < nsyscalls; ++i)
 593                 perf_evsel__close_fd(evsels[i], 1, threads->nr);
 594 out_free_evlist:
 595         perf_evlist__delete(evlist);
 596 out_free_cpus:
 597         cpu_map__delete(cpus);
 598 out_free_threads:
 599         thread_map__delete(threads);
 600         return err;
 601 #undef nsyscalls
 602 }
 603
 604 #define TEST_ASSERT_VAL(text, cond) \
 605 do { \
 606         if (!(cond)) { \
 607                 pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
 608                 return -1; \
 609         } \
 610 } while (0)
 611
 612 static 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
 626 static 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
 644 static 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
 655 static 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
 666 static 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
 678 static 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
 690 static 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
 701 static 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
 716 static 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
 730 static 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
 746 static 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
 762 static int test__checkevent_tracepoint_modifier(struct perf_evlist *evlist)
 763 {
 764         struct perf_evsel *evsel = list_entry(evlist->entries.next,
 765                                               struct perf_evsel, node);
 766
 767         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
 768         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
 769         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
 770         TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
 771
 772         return test__checkevent_tracepoint(evlist);
 773 }
 774
 775 static int
 776 test__checkevent_tracepoint_multi_modifier(struct perf_evlist *evlist)
 777 {
 778         struct perf_evsel *evsel;
 779
 780         TEST_ASSERT_VAL("wrong number of entries", evlist->nr_entries > 1);
 781
 782         list_for_each_entry(evsel, &evlist->entries, node) {
 783                 TEST_ASSERT_VAL("wrong exclude_user",
 784                                 !evsel->attr.exclude_user);
 785                 TEST_ASSERT_VAL("wrong exclude_kernel",
 786                                 evsel->attr.exclude_kernel);
 787                 TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
 788                 TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
 789         }
 790
 791         return test__checkevent_tracepoint_multi(evlist);
 792 }
 793
 794 static int test__checkevent_raw_modifier(struct perf_evlist *evlist)
 795 {
 796         struct perf_evsel *evsel = list_entry(evlist->entries.next,
 797                                               struct perf_evsel, node);
 798
 799         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
 800         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
 801         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
 802         TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
 803
 804         return test__checkevent_raw(evlist);
 805 }
 806
 807 static int test__checkevent_numeric_modifier(struct perf_evlist *evlist)
 808 {
 809         struct perf_evsel *evsel = list_entry(evlist->entries.next,
 810                                               struct perf_evsel, node);
 811
 812         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
 813         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
 814         TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
 815         TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
 816
 817         return test__checkevent_numeric(evlist);
 818 }
 819
 820 static int test__checkevent_symbolic_name_modifier(struct perf_evlist *evlist)
 821 {
 822         struct perf_evsel *evsel = list_entry(evlist->entries.next,
 823                                               struct perf_evsel, node);
 824
 825         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
 826         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
 827         TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
 828         TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
 829
 830         return test__checkevent_symbolic_name(evlist);
 831 }
 832
 833 static int test__checkevent_symbolic_alias_modifier(struct perf_evlist *evlist)
 834 {
 835         struct perf_evsel *evsel = list_entry(evlist->entries.next,
 836                                               struct perf_evsel, node);
 837
 838         TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
 839         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
 840         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
 841         TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
 842
 843         return test__checkevent_symbolic_alias(evlist);
 844 }
 845
 846 static int test__checkevent_genhw_modifier(struct perf_evlist *evlist)
 847 {
 848         struct perf_evsel *evsel = list_entry(evlist->entries.next,
 849                                               struct perf_evsel, node);
 850
 851         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
 852         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
 853         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
 854         TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
 855
 856         return test__checkevent_genhw(evlist);
 857 }
 858
 859 static struct test__event_st {
 860         const char *name;
 861         __u32 type;
 862         int (*check)(struct perf_evlist *evlist);
 863 } test__events[] = {
 864         {
 865                 .name  = "syscalls:sys_enter_open",
 866                 .check = test__checkevent_tracepoint,
 867         },
 868         {
 869                 .name  = "syscalls:*",
 870                 .check = test__checkevent_tracepoint_multi,
 871         },
 872         {
 873                 .name  = "r1",
 874                 .check = test__checkevent_raw,
 875         },
 876         {
 877                 .name  = "1:1",
 878                 .check = test__checkevent_numeric,
 879         },
 880         {
 881                 .name  = "instructions",
 882                 .check = test__checkevent_symbolic_name,
 883         },
 884         {
 885                 .name  = "faults",
 886                 .check = test__checkevent_symbolic_alias,
 887         },
 888         {
 889                 .name  = "L1-dcache-load-miss",
 890                 .check = test__checkevent_genhw,
 891         },
 892         {
 893                 .name  = "mem:0",
 894                 .check = test__checkevent_breakpoint,
 895         },
 896         {
 897                 .name  = "mem:0:x",
 898                 .check = test__checkevent_breakpoint_x,
 899         },
 900         {
 901                 .name  = "mem:0:r",
 902                 .check = test__checkevent_breakpoint_r,
 903         },
 904         {
 905                 .name  = "mem:0:w",
 906                 .check = test__checkevent_breakpoint_w,
 907         },
 908         {
 909                 .name  = "syscalls:sys_enter_open:k",
 910                 .check = test__checkevent_tracepoint_modifier,
 911         },
 912         {
 913                 .name  = "syscalls:*:u",
 914                 .check = test__checkevent_tracepoint_multi_modifier,
 915         },
 916         {
 917                 .name  = "r1:kp",
 918                 .check = test__checkevent_raw_modifier,
 919         },
 920         {
 921                 .name  = "1:1:hp",
 922                 .check = test__checkevent_numeric_modifier,
 923         },
 924         {
 925                 .name  = "instructions:h",
 926                 .check = test__checkevent_symbolic_name_modifier,
 927         },
 928         {
 929                 .name  = "faults:u",
 930                 .check = test__checkevent_symbolic_alias_modifier,
 931         },
 932         {
 933                 .name  = "L1-dcache-load-miss:kp",
 934                 .check = test__checkevent_genhw_modifier,
 935         },
 936 };
 937
 938 #define TEST__EVENTS_CNT (sizeof(test__events) / sizeof(struct test__event_st))
 939
 940 static int test__parse_events(void)
 941 {
 942         struct perf_evlist *evlist;
 943         u_int i;
 944         int ret = 0;
 945
 946         for (i = 0; i < TEST__EVENTS_CNT; i++) {
 947                 struct test__event_st *e = &test__events[i];
 948
 949                 evlist = perf_evlist__new(NULL, NULL);
 950                 if (evlist == NULL)
 951                         break;
 952
 953                 ret = parse_events(evlist, e->name, 0);
 954                 if (ret) {
 955                         pr_debug("failed to parse event '%s', err %d\n",
 956                                  e->name, ret);
 957                         break;
 958                 }
 959
 960                 ret = e->check(evlist);
 961                 if (ret)
 962                         break;
 963
 964                 perf_evlist__delete(evlist);
 965         }
 966
 967         return ret;
 968 }
 969
 970 static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t **maskp,
 971                                          size_t *sizep)
 972 {
 973         cpu_set_t *mask;
 974         size_t size;
 975         int i, cpu = -1, nrcpus = 1024;
 976 realloc:
 977         mask = CPU_ALLOC(nrcpus);
 978         size = CPU_ALLOC_SIZE(nrcpus);
 979         CPU_ZERO_S(size, mask);
 980
 981         if (sched_getaffinity(pid, size, mask) == -1) {
 982                 CPU_FREE(mask);
 983                 if (errno == EINVAL && nrcpus < (1024 << 8)) {
 984                         nrcpus = nrcpus << 2;
 985                         goto realloc;
 986                 }
 987                 perror("sched_getaffinity");
 988                         return -1;
 989         }
 990
 991         for (i = 0; i < nrcpus; i++) {
 992                 if (CPU_ISSET_S(i, size, mask)) {
 993                         if (cpu == -1) {
 994                                 cpu = i;
 995                                 *maskp = mask;
 996                                 *sizep = size;
 997                         } else
 998                                 CPU_CLR_S(i, size, mask);
 999                 }
1000         }
1001
1002         if (cpu == -1)
1003                 CPU_FREE(mask);
1004
1005         return cpu;
1006 }
1007
1008 static int test__PERF_RECORD(void)
1009 {
1010         struct perf_record_opts opts = {
1011                 .target_pid = -1,
1012                 .target_tid = -1,
1013                 .no_delay   = true,
1014                 .freq       = 10,
1015                 .mmap_pages = 256,
1016                 .sample_id_all_avail = true,
1017         };
1018         cpu_set_t *cpu_mask = NULL;
1019         size_t cpu_mask_size = 0;
1020         struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
1021         struct perf_evsel *evsel;
1022         struct perf_sample sample;
1023         const char *cmd = "sleep";
1024         const char *argv[] = { cmd, "1", NULL, };
1025         char *bname;
1026         u64 sample_type, prev_time = 0;
1027         bool found_cmd_mmap = false,
1028              found_libc_mmap = false,
1029              found_vdso_mmap = false,
1030              found_ld_mmap = false;
1031         int err = -1, errs = 0, i, wakeups = 0, sample_size;
1032         u32 cpu;
1033         int total_events = 0, nr_events[PERF_RECORD_MAX] = { 0, };
1034
1035         if (evlist == NULL || argv == NULL) {
1036                 pr_debug("Not enough memory to create evlist\n");
1037                 goto out;
1038         }
1039
1040         /*
1041          * We need at least one evsel in the evlist, use the default
1042          * one: "cycles".
1043          */
1044         err = perf_evlist__add_default(evlist);
1045         if (err < 0) {
1046                 pr_debug("Not enough memory to create evsel\n");
1047                 goto out_delete_evlist;
1048         }
1049
1050         /*
1051          * Create maps of threads and cpus to monitor. In this case
1052          * we start with all threads and cpus (-1, -1) but then in
1053          * perf_evlist__prepare_workload we'll fill in the only thread
1054          * we're monitoring, the one forked there.
1055          */
1056         err = perf_evlist__create_maps(evlist, opts.target_pid,
1057                                        opts.target_tid, opts.cpu_list);
1058         if (err < 0) {
1059                 pr_debug("Not enough memory to create thread/cpu maps\n");
1060                 goto out_delete_evlist;
1061         }
1062
1063         /*
1064          * Prepare the workload in argv[] to run, it'll fork it, and then wait
1065          * for perf_evlist__start_workload() to exec it. This is done this way
1066          * so that we have time to open the evlist (calling sys_perf_event_open
1067          * on all the fds) and then mmap them.
1068          */
1069         err = perf_evlist__prepare_workload(evlist, &opts, argv);
1070         if (err < 0) {
1071                 pr_debug("Couldn't run the workload!\n");
1072                 goto out_delete_evlist;
1073         }
1074
1075         /*
1076          * Config the evsels, setting attr->comm on the first one, etc.
1077          */
1078         evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
1079         evsel->attr.sample_type |= PERF_SAMPLE_CPU;
1080         evsel->attr.sample_type |= PERF_SAMPLE_TID;
1081         evsel->attr.sample_type |= PERF_SAMPLE_TIME;
1082         perf_evlist__config_attrs(evlist, &opts);
1083
1084         err = sched__get_first_possible_cpu(evlist->workload.pid, &cpu_mask,
1085                                             &cpu_mask_size);
1086         if (err < 0) {
1087                 pr_debug("sched__get_first_possible_cpu: %s\n", strerror(errno));
1088                 goto out_delete_evlist;
1089         }
1090
1091         cpu = err;
1092
1093         /*
1094          * So that we can check perf_sample.cpu on all the samples.
1095          */
1096         if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, cpu_mask) < 0) {
1097                 pr_debug("sched_setaffinity: %s\n", strerror(errno));
1098                 goto out_free_cpu_mask;
1099         }
1100
1101         /*
1102          * Call sys_perf_event_open on all the fds on all the evsels,
1103          * grouping them if asked to.
1104          */
1105         err = perf_evlist__open(evlist, opts.group);
1106         if (err < 0) {
1107                 pr_debug("perf_evlist__open: %s\n", strerror(errno));
1108                 goto out_delete_evlist;
1109         }
1110
1111         /*
1112          * mmap the first fd on a given CPU and ask for events for the other
1113          * fds in the same CPU to be injected in the same mmap ring buffer
1114          * (using ioctl(PERF_EVENT_IOC_SET_OUTPUT)).
1115          */
1116         err = perf_evlist__mmap(evlist, opts.mmap_pages, false);
1117         if (err < 0) {
1118                 pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
1119                 goto out_delete_evlist;
1120         }
1121
1122         /*
1123          * We'll need these two to parse the PERF_SAMPLE_* fields in each
1124          * event.
1125          */
1126         sample_type = perf_evlist__sample_type(evlist);
1127         sample_size = __perf_evsel__sample_size(sample_type);
1128
1129         /*
1130          * Now that all is properly set up, enable the events, they will
1131          * count just on workload.pid, which will start...
1132          */
1133         perf_evlist__enable(evlist);
1134
1135         /*
1136          * Now!
1137          */
1138         perf_evlist__start_workload(evlist);
1139
1140         while (1) {
1141                 int before = total_events;
1142
1143                 for (i = 0; i < evlist->nr_mmaps; i++) {
1144                         union perf_event *event;
1145
1146                         while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
1147                                 const u32 type = event->header.type;
1148                                 const char *name = perf_event__name(type);
1149
1150                                 ++total_events;
1151                                 if (type < PERF_RECORD_MAX)
1152                                         nr_events[type]++;
1153
1154                                 err = perf_event__parse_sample(event, sample_type,
1155                                                                sample_size, true,
1156                                                                &sample, false);
1157                                 if (err < 0) {
1158                                         if (verbose)
1159                                                 perf_event__fprintf(event, stderr);
1160                                         pr_debug("Couldn't parse sample\n");
1161                                         goto out_err;
1162                                 }
1163
1164                                 if (verbose) {
1165                                         pr_info("%" PRIu64" %d ", sample.time, sample.cpu);
1166                                         perf_event__fprintf(event, stderr);
1167                                 }
1168
1169                                 if (prev_time > sample.time) {
1170                                         pr_debug("%s going backwards in time, prev=%" PRIu64 ", curr=%" PRIu64 "\n",
1171                                                  name, prev_time, sample.time);
1172                                         ++errs;
1173                                 }
1174
1175                                 prev_time = sample.time;
1176
1177                                 if (sample.cpu != cpu) {
1178                                         pr_debug("%s with unexpected cpu, expected %d, got %d\n",
1179                                                  name, cpu, sample.cpu);
1180                                         ++errs;
1181                                 }
1182
1183                                 if ((pid_t)sample.pid != evlist->workload.pid) {
1184                                         pr_debug("%s with unexpected pid, expected %d, got %d\n",
1185                                                  name, evlist->workload.pid, sample.pid);
1186                                         ++errs;
1187                                 }
1188
1189                                 if ((pid_t)sample.tid != evlist->workload.pid) {
1190                                         pr_debug("%s with unexpected tid, expected %d, got %d\n",
1191                                                  name, evlist->workload.pid, sample.tid);
1192                                         ++errs;
1193                                 }
1194
1195                                 if ((type == PERF_RECORD_COMM ||
1196                                      type == PERF_RECORD_MMAP ||
1197                                      type == PERF_RECORD_FORK ||
1198                                      type == PERF_RECORD_EXIT) &&
1199                                      (pid_t)event->comm.pid != evlist->workload.pid) {
1200                                         pr_debug("%s with unexpected pid/tid\n", name);
1201                                         ++errs;
1202                                 }
1203
1204                                 if ((type == PERF_RECORD_COMM ||
1205                                      type == PERF_RECORD_MMAP) &&
1206                                      event->comm.pid != event->comm.tid) {
1207                                         pr_debug("%s with different pid/tid!\n", name);
1208                                         ++errs;
1209                                 }
1210
1211                                 switch (type) {
1212                                 case PERF_RECORD_COMM:
1213                                         if (strcmp(event->comm.comm, cmd)) {
1214                                                 pr_debug("%s with unexpected comm!\n", name);
1215                                                 ++errs;
1216                                         }
1217                                         break;
1218                                 case PERF_RECORD_EXIT:
1219                                         goto found_exit;
1220                                 case PERF_RECORD_MMAP:
1221                                         bname = strrchr(event->mmap.filename, '/');
1222                                         if (bname != NULL) {
1223                                                 if (!found_cmd_mmap)
1224                                                         found_cmd_mmap = !strcmp(bname + 1, cmd);
1225                                                 if (!found_libc_mmap)
1226                                                         found_libc_mmap = !strncmp(bname + 1, "libc", 4);
1227                                                 if (!found_ld_mmap)
1228                                                         found_ld_mmap = !strncmp(bname + 1, "ld", 2);
1229                                         } else if (!found_vdso_mmap)
1230                                                 found_vdso_mmap = !strcmp(event->mmap.filename, "[vdso]");
1231                                         break;
1232
1233                                 case PERF_RECORD_SAMPLE:
1234                                         /* Just ignore samples for now */
1235                                         break;
1236                                 default:
1237                                         pr_debug("Unexpected perf_event->header.type %d!\n",
1238                                                  type);
1239                                         ++errs;
1240                                 }
1241                         }
1242                 }
1243
1244                 /*
1245                  * We don't use poll here because at least at 3.1 times the
1246                  * PERF_RECORD_{!SAMPLE} events don't honour
1247                  * perf_event_attr.wakeup_events, just PERF_EVENT_SAMPLE does.
1248                  */
1249                 if (total_events == before && false)
1250                         poll(evlist->pollfd, evlist->nr_fds, -1);
1251
1252                 sleep(1);
1253                 if (++wakeups > 5) {
1254                         pr_debug("No PERF_RECORD_EXIT event!\n");
1255                         break;
1256                 }
1257         }
1258
1259 found_exit:
1260         if (nr_events[PERF_RECORD_COMM] > 1) {
1261                 pr_debug("Excessive number of PERF_RECORD_COMM events!\n");
1262                 ++errs;
1263         }
1264
1265         if (nr_events[PERF_RECORD_COMM] == 0) {
1266                 pr_debug("Missing PERF_RECORD_COMM for %s!\n", cmd);
1267                 ++errs;
1268         }
1269
1270         if (!found_cmd_mmap) {
1271                 pr_debug("PERF_RECORD_MMAP for %s missing!\n", cmd);
1272                 ++errs;
1273         }
1274
1275         if (!found_libc_mmap) {
1276                 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "libc");
1277                 ++errs;
1278         }
1279
1280         if (!found_ld_mmap) {
1281                 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "ld");
1282                 ++errs;
1283         }
1284
1285         if (!found_vdso_mmap) {
1286                 pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
1287                 ++errs;
1288         }
1289 out_err:
1290         perf_evlist__munmap(evlist);
1291 out_free_cpu_mask:
1292         CPU_FREE(cpu_mask);
1293 out_delete_evlist:
1294         perf_evlist__delete(evlist);
1295 out:
1296         return (err < 0 || errs > 0) ? -1 : 0;
1297 }
1298
1299 static struct test {
1300         const char *desc;
1301         int (*func)(void);
1302 } tests[] = {
1303         {
1304                 .desc = "vmlinux symtab matches kallsyms",
1305                 .func = test__vmlinux_matches_kallsyms,
1306         },
1307         {
1308                 .desc = "detect open syscall event",
1309                 .func = test__open_syscall_event,
1310         },
1311         {
1312                 .desc = "detect open syscall event on all cpus",
1313                 .func = test__open_syscall_event_on_all_cpus,
1314         },
1315         {
1316                 .desc = "read samples using the mmap interface",
1317                 .func = test__basic_mmap,
1318         },
1319         {
1320                 .desc = "parse events tests",
1321                 .func = test__parse_events,
1322         },
1323         {
1324                 .desc = "Validate PERF_RECORD_* events & perf_sample fields",
1325                 .func = test__PERF_RECORD,
1326         },
1327         {
1328                 .func = NULL,
1329         },
1330 };
1331
1332 static bool perf_test__matches(int curr, int argc, const char *argv[])
1333 {
1334         int i;
1335
1336         if (argc == 0)
1337                 return true;
1338
1339         for (i = 0; i < argc; ++i) {
1340                 char *end;
1341                 long nr = strtoul(argv[i], &end, 10);
1342
1343                 if (*end == '\0') {
1344                         if (nr == curr + 1)
1345                                 return true;
1346                         continue;
1347                 }
1348
1349                 if (strstr(tests[curr].desc, argv[i]))
1350                         return true;
1351         }
1352
1353         return false;
1354 }
1355
1356 static int __cmd_test(int argc, const char *argv[])
1357 {
1358         int i = 0;
1359
1360         while (tests[i].func) {
1361                 int curr = i++, err;
1362
1363                 if (!perf_test__matches(curr, argc, argv))
1364                         continue;
1365
1366                 pr_info("%2d: %s:", i, tests[curr].desc);
1367                 pr_debug("\n--- start ---\n");
1368                 err = tests[curr].func();
1369                 pr_debug("---- end ----\n%s:", tests[curr].desc);
1370                 pr_info(" %s\n", err ? "FAILED!\n" : "Ok");
1371         }
1372
1373         return 0;
1374 }
1375
1376 static int perf_test__list(int argc, const char **argv)
1377 {
1378         int i = 0;
1379
1380         while (tests[i].func) {
1381                 int curr = i++;
1382
1383                 if (argc > 1 && !strstr(tests[curr].desc, argv[1]))
1384                         continue;
1385
1386                 pr_info("%2d: %s\n", i, tests[curr].desc);
1387         }
1388
1389         return 0;
1390 }
1391
1392 int cmd_test(int argc, const char **argv, const char *prefix __used)
1393 {
1394         const char * const test_usage[] = {
1395         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
1396         NULL,
1397         };
1398         const struct option test_options[] = {
1399         OPT_INCR('v', "verbose", &verbose,
1400                     "be more verbose (show symbol address, etc)"),
1401         OPT_END()
1402         };
1403
1404         argc = parse_options(argc, argv, test_options, test_usage, 0);
1405         if (argc >= 1 && !strcmp(argv[0], "list"))
1406                 return perf_test__list(argc, argv);
1407
1408         symbol_conf.priv_size = sizeof(int);
1409         symbol_conf.sort_by_name = true;
1410         symbol_conf.try_vmlinux_path = true;
1411
1412         if (symbol__init() < 0)
1413                 return -1;
1414
1415         setup_pager();
1416
1417         return __cmd_test(argc, argv);
1418 }