kernel/tools/perf/tests/builtin-test.c

   1 /*
   2  * builtin-test.c
   3  *
   4  * Builtin regression testing command: ever growing number of sanity tests
   5  */
   6 #include <unistd.h>
   7 #include <string.h>
   8 #include "builtin.h"
   9 #include "hist.h"
  10 #include "intlist.h"
  11 #include "tests.h"
  12 #include "debug.h"
  13 #include "color.h"
  14 #include "parse-options.h"
  15 #include "symbol.h"
  16
  17 struct test __weak arch_tests[] = {
  18         {
  19                 .func = NULL,
  20         },
  21 };
  22
  23 static struct test generic_tests[] = {
  24         {
  25                 .desc = "vmlinux symtab matches kallsyms",
  26                 .func = test__vmlinux_matches_kallsyms,
  27         },
  28         {
  29                 .desc = "detect openat syscall event",
  30                 .func = test__openat_syscall_event,
  31         },
  32         {
  33                 .desc = "detect openat syscall event on all cpus",
  34                 .func = test__openat_syscall_event_on_all_cpus,
  35         },
  36         {
  37                 .desc = "read samples using the mmap interface",
  38                 .func = test__basic_mmap,
  39         },
  40         {
  41                 .desc = "parse events tests",
  42                 .func = test__parse_events,
  43         },
  44         {
  45                 .desc = "Validate PERF_RECORD_* events & perf_sample fields",
  46                 .func = test__PERF_RECORD,
  47         },
  48         {
  49                 .desc = "Test perf pmu format parsing",
  50                 .func = test__pmu,
  51         },
  52         {
  53                 .desc = "Test dso data read",
  54                 .func = test__dso_data,
  55         },
  56         {
  57                 .desc = "Test dso data cache",
  58                 .func = test__dso_data_cache,
  59         },
  60         {
  61                 .desc = "Test dso data reopen",
  62                 .func = test__dso_data_reopen,
  63         },
  64         {
  65                 .desc = "roundtrip evsel->name check",
  66                 .func = test__perf_evsel__roundtrip_name_test,
  67         },
  68         {
  69                 .desc = "Check parsing of sched tracepoints fields",
  70                 .func = test__perf_evsel__tp_sched_test,
  71         },
  72         {
  73                 .desc = "Generate and check syscalls:sys_enter_openat event fields",
  74                 .func = test__syscall_openat_tp_fields,
  75         },
  76         {
  77                 .desc = "struct perf_event_attr setup",
  78                 .func = test__attr,
  79         },
  80         {
  81                 .desc = "Test matching and linking multiple hists",
  82                 .func = test__hists_link,
  83         },
  84         {
  85                 .desc = "Try 'import perf' in python, checking link problems",
  86                 .func = test__python_use,
  87         },
  88         {
  89                 .desc = "Test breakpoint overflow signal handler",
  90                 .func = test__bp_signal,
  91         },
  92         {
  93                 .desc = "Test breakpoint overflow sampling",
  94                 .func = test__bp_signal_overflow,
  95         },
  96         {
  97                 .desc = "Test number of exit event of a simple workload",
  98                 .func = test__task_exit,
  99         },
 100         {
 101                 .desc = "Test software clock events have valid period values",
 102                 .func = test__sw_clock_freq,
 103         },
 104         {
 105                 .desc = "Test object code reading",
 106                 .func = test__code_reading,
 107         },
 108         {
 109                 .desc = "Test sample parsing",
 110                 .func = test__sample_parsing,
 111         },
 112         {
 113                 .desc = "Test using a dummy software event to keep tracking",
 114                 .func = test__keep_tracking,
 115         },
 116         {
 117                 .desc = "Test parsing with no sample_id_all bit set",
 118                 .func = test__parse_no_sample_id_all,
 119         },
 120         {
 121                 .desc = "Test filtering hist entries",
 122                 .func = test__hists_filter,
 123         },
 124         {
 125                 .desc = "Test mmap thread lookup",
 126                 .func = test__mmap_thread_lookup,
 127         },
 128         {
 129                 .desc = "Test thread mg sharing",
 130                 .func = test__thread_mg_share,
 131         },
 132         {
 133                 .desc = "Test output sorting of hist entries",
 134                 .func = test__hists_output,
 135         },
 136         {
 137                 .desc = "Test cumulation of child hist entries",
 138                 .func = test__hists_cumulate,
 139         },
 140         {
 141                 .desc = "Test tracking with sched_switch",
 142                 .func = test__switch_tracking,
 143         },
 144         {
 145                 .desc = "Filter fds with revents mask in a fdarray",
 146                 .func = test__fdarray__filter,
 147         },
 148         {
 149                 .desc = "Add fd to a fdarray, making it autogrow",
 150                 .func = test__fdarray__add,
 151         },
 152         {
 153                 .desc = "Test kmod_path__parse function",
 154                 .func = test__kmod_path__parse,
 155         },
 156         {
 157                 .desc = "Test thread map",
 158                 .func = test__thread_map,
 159         },
 160         {
 161                 .desc = "Test LLVM searching and compiling",
 162                 .func = test__llvm,
 163         },
 164         {
 165                 .desc = "Test topology in session",
 166                 .func = test_session_topology,
 167         },
 168         {
 169                 .desc = "Test BPF filter",
 170                 .func = test__bpf,
 171         },
 172         {
 173                 .func = NULL,
 174         },
 175 };
 176
 177 static struct test *tests[] = {
 178         generic_tests,
 179         arch_tests,
 180 };
 181
 182 static bool perf_test__matches(struct test *test, int curr, int argc, const char *argv[])
 183 {
 184         int i;
 185
 186         if (argc == 0)
 187                 return true;
 188
 189         for (i = 0; i < argc; ++i) {
 190                 char *end;
 191                 long nr = strtoul(argv[i], &end, 10);
 192
 193                 if (*end == '\0') {
 194                         if (nr == curr + 1)
 195                                 return true;
 196                         continue;
 197                 }
 198
 199                 if (strcasestr(test->desc, argv[i]))
 200                         return true;
 201         }
 202
 203         return false;
 204 }
 205
 206 static int run_test(struct test *test)
 207 {
 208         int status, err = -1, child = fork();
 209         char sbuf[STRERR_BUFSIZE];
 210
 211         if (child < 0) {
 212                 pr_err("failed to fork test: %s\n",
 213                         strerror_r(errno, sbuf, sizeof(sbuf)));
 214                 return -1;
 215         }
 216
 217         if (!child) {
 218                 pr_debug("test child forked, pid %d\n", getpid());
 219                 err = test->func();
 220                 exit(err);
 221         }
 222
 223         wait(&status);
 224
 225         if (WIFEXITED(status)) {
 226                 err = (signed char)WEXITSTATUS(status);
 227                 pr_debug("test child finished with %d\n", err);
 228         } else if (WIFSIGNALED(status)) {
 229                 err = -1;
 230                 pr_debug("test child interrupted\n");
 231         }
 232
 233         return err;
 234 }
 235
 236 #define for_each_test(j, t)                                     \
 237         for (j = 0; j < ARRAY_SIZE(tests); j++) \
 238                 for (t = &tests[j][0]; t->func; t++)
 239
 240 static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
 241 {
 242         struct test *t;
 243         unsigned int j;
 244         int i = 0;
 245         int width = 0;
 246
 247         for_each_test(j, t) {
 248                 int len = strlen(t->desc);
 249
 250                 if (width < len)
 251                         width = len;
 252         }
 253
 254         for_each_test(j, t) {
 255                 int curr = i++, err;
 256
 257                 if (!perf_test__matches(t, curr, argc, argv))
 258                         continue;
 259
 260                 pr_info("%2d: %-*s:", i, width, t->desc);
 261
 262                 if (intlist__find(skiplist, i)) {
 263                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
 264                         continue;
 265                 }
 266
 267                 pr_debug("\n--- start ---\n");
 268                 err = run_test(t);
 269                 pr_debug("---- end ----\n%s:", t->desc);
 270
 271                 switch (err) {
 272                 case TEST_OK:
 273                         pr_info(" Ok\n");
 274                         break;
 275                 case TEST_SKIP:
 276                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
 277                         break;
 278                 case TEST_FAIL:
 279                 default:
 280                         color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
 281                         break;
 282                 }
 283         }
 284
 285         return 0;
 286 }
 287
 288 static int perf_test__list(int argc, const char **argv)
 289 {
 290         unsigned int j;
 291         struct test *t;
 292         int i = 0;
 293
 294         for_each_test(j, t) {
 295                 if (argc > 1 && !strstr(t->desc, argv[1]))
 296                         continue;
 297
 298                 pr_info("%2d: %s\n", ++i, t->desc);
 299         }
 300
 301         return 0;
 302 }
 303
 304 int cmd_test(int argc, const char **argv, const char *prefix __maybe_unused)
 305 {
 306         const char *test_usage[] = {
 307         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
 308         NULL,
 309         };
 310         const char *skip = NULL;
 311         const struct option test_options[] = {
 312         OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
 313         OPT_INCR('v', "verbose", &verbose,
 314                     "be more verbose (show symbol address, etc)"),
 315         OPT_END()
 316         };
 317         const char * const test_subcommands[] = { "list", NULL };
 318         struct intlist *skiplist = NULL;
 319         int ret = hists__init();
 320
 321         if (ret < 0)
 322                 return ret;
 323
 324         argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
 325         if (argc >= 1 && !strcmp(argv[0], "list"))
 326                 return perf_test__list(argc, argv);
 327
 328         symbol_conf.priv_size = sizeof(int);
 329         symbol_conf.sort_by_name = true;
 330         symbol_conf.try_vmlinux_path = true;
 331
 332         if (symbol__init(NULL) < 0)
 333                 return -1;
 334
 335         if (skip != NULL)
 336                 skiplist = intlist__new(skip);
 337
 338         return __cmd_test(argc, argv, skiplist);
 339 }