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