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 static struct test {
  18         const char *desc;
  19         int (*func)(void);
  20 } tests[] = {
  21         {
  22                 .desc = "vmlinux symtab matches kallsyms",
  23                 .func = test__vmlinux_matches_kallsyms,
  24         },
  25         {
  26                 .desc = "detect open syscall event",
  27                 .func = test__open_syscall_event,
  28         },
  29         {
  30                 .desc = "detect open syscall event on all cpus",
  31                 .func = test__open_syscall_event_on_all_cpus,
  32         },
  33         {
  34                 .desc = "read samples using the mmap interface",
  35                 .func = test__basic_mmap,
  36         },
  37         {
  38                 .desc = "parse events tests",
  39                 .func = test__parse_events,
  40         },
  41 #if defined(__x86_64__) || defined(__i386__)
  42         {
  43                 .desc = "x86 rdpmc test",
  44                 .func = test__rdpmc,
  45         },
  46 #endif
  47         {
  48                 .desc = "Validate PERF_RECORD_* events & perf_sample fields",
  49                 .func = test__PERF_RECORD,
  50         },
  51         {
  52                 .desc = "Test perf pmu format parsing",
  53                 .func = test__pmu,
  54         },
  55         {
  56                 .desc = "Test dso data read",
  57                 .func = test__dso_data,
  58         },
  59         {
  60                 .desc = "Test dso data cache",
  61                 .func = test__dso_data_cache,
  62         },
  63         {
  64                 .desc = "Test dso data reopen",
  65                 .func = test__dso_data_reopen,
  66         },
  67         {
  68                 .desc = "roundtrip evsel->name check",
  69                 .func = test__perf_evsel__roundtrip_name_test,
  70         },
  71         {
  72                 .desc = "Check parsing of sched tracepoints fields",
  73                 .func = test__perf_evsel__tp_sched_test,
  74         },
  75         {
  76                 .desc = "Generate and check syscalls:sys_enter_open event fields",
  77                 .func = test__syscall_open_tp_fields,
  78         },
  79         {
  80                 .desc = "struct perf_event_attr setup",
  81                 .func = test__attr,
  82         },
  83         {
  84                 .desc = "Test matching and linking multiple hists",
  85                 .func = test__hists_link,
  86         },
  87         {
  88                 .desc = "Try 'import perf' in python, checking link problems",
  89                 .func = test__python_use,
  90         },
  91         {
  92                 .desc = "Test breakpoint overflow signal handler",
  93                 .func = test__bp_signal,
  94         },
  95         {
  96                 .desc = "Test breakpoint overflow sampling",
  97                 .func = test__bp_signal_overflow,
  98         },
  99         {
 100                 .desc = "Test number of exit event of a simple workload",
 101                 .func = test__task_exit,
 102         },
 103         {
 104                 .desc = "Test software clock events have valid period values",
 105                 .func = test__sw_clock_freq,
 106         },
 107 #if defined(__x86_64__) || defined(__i386__)
 108         {
 109                 .desc = "Test converting perf time to TSC",
 110                 .func = test__perf_time_to_tsc,
 111         },
 112 #endif
 113         {
 114                 .desc = "Test object code reading",
 115                 .func = test__code_reading,
 116         },
 117         {
 118                 .desc = "Test sample parsing",
 119                 .func = test__sample_parsing,
 120         },
 121         {
 122                 .desc = "Test using a dummy software event to keep tracking",
 123                 .func = test__keep_tracking,
 124         },
 125         {
 126                 .desc = "Test parsing with no sample_id_all bit set",
 127                 .func = test__parse_no_sample_id_all,
 128         },
 129 #if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
 130 #ifdef HAVE_DWARF_UNWIND_SUPPORT
 131         {
 132                 .desc = "Test dwarf unwind",
 133                 .func = test__dwarf_unwind,
 134         },
 135 #endif
 136 #endif
 137         {
 138                 .desc = "Test filtering hist entries",
 139                 .func = test__hists_filter,
 140         },
 141         {
 142                 .desc = "Test mmap thread lookup",
 143                 .func = test__mmap_thread_lookup,
 144         },
 145         {
 146                 .desc = "Test thread mg sharing",
 147                 .func = test__thread_mg_share,
 148         },
 149         {
 150                 .desc = "Test output sorting of hist entries",
 151                 .func = test__hists_output,
 152         },
 153         {
 154                 .desc = "Test cumulation of child hist entries",
 155                 .func = test__hists_cumulate,
 156         },
 157         {
 158                 .desc = "Test tracking with sched_switch",
 159                 .func = test__switch_tracking,
 160         },
 161         {
 162                 .desc = "Filter fds with revents mask in a fdarray",
 163                 .func = test__fdarray__filter,
 164         },
 165         {
 166                 .desc = "Add fd to a fdarray, making it autogrow",
 167                 .func = test__fdarray__add,
 168         },
 169         {
 170                 .desc = "Test kmod_path__parse function",
 171                 .func = test__kmod_path__parse,
 172         },
 173         {
 174                 .func = NULL,
 175         },
 176 };
 177
 178 static bool perf_test__matches(int curr, int argc, const char *argv[])
 179 {
 180         int i;
 181
 182         if (argc == 0)
 183                 return true;
 184
 185         for (i = 0; i < argc; ++i) {
 186                 char *end;
 187                 long nr = strtoul(argv[i], &end, 10);
 188
 189                 if (*end == '\0') {
 190                         if (nr == curr + 1)
 191                                 return true;
 192                         continue;
 193                 }
 194
 195                 if (strstr(tests[curr].desc, argv[i]))
 196                         return true;
 197         }
 198
 199         return false;
 200 }
 201
 202 static int run_test(struct test *test)
 203 {
 204         int status, err = -1, child = fork();
 205         char sbuf[STRERR_BUFSIZE];
 206
 207         if (child < 0) {
 208                 pr_err("failed to fork test: %s\n",
 209                         strerror_r(errno, sbuf, sizeof(sbuf)));
 210                 return -1;
 211         }
 212
 213         if (!child) {
 214                 pr_debug("test child forked, pid %d\n", getpid());
 215                 err = test->func();
 216                 exit(err);
 217         }
 218
 219         wait(&status);
 220
 221         if (WIFEXITED(status)) {
 222                 err = WEXITSTATUS(status);
 223                 pr_debug("test child finished with %d\n", err);
 224         } else if (WIFSIGNALED(status)) {
 225                 err = -1;
 226                 pr_debug("test child interrupted\n");
 227         }
 228
 229         return err;
 230 }
 231
 232 static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
 233 {
 234         int i = 0;
 235         int width = 0;
 236
 237         while (tests[i].func) {
 238                 int len = strlen(tests[i].desc);
 239
 240                 if (width < len)
 241                         width = len;
 242                 ++i;
 243         }
 244
 245         i = 0;
 246         while (tests[i].func) {
 247                 int curr = i++, err;
 248
 249                 if (!perf_test__matches(curr, argc, argv))
 250                         continue;
 251
 252                 pr_info("%2d: %-*s:", i, width, tests[curr].desc);
 253
 254                 if (intlist__find(skiplist, i)) {
 255                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
 256                         continue;
 257                 }
 258
 259                 pr_debug("\n--- start ---\n");
 260                 err = run_test(&tests[curr]);
 261                 pr_debug("---- end ----\n%s:", tests[curr].desc);
 262
 263                 switch (err) {
 264                 case TEST_OK:
 265                         pr_info(" Ok\n");
 266                         break;
 267                 case TEST_SKIP:
 268                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
 269                         break;
 270                 case TEST_FAIL:
 271                 default:
 272                         color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
 273                         break;
 274                 }
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int perf_test__list(int argc, const char **argv)
 281 {
 282         int i = 0;
 283
 284         while (tests[i].func) {
 285                 int curr = i++;
 286
 287                 if (argc > 1 && !strstr(tests[curr].desc, argv[1]))
 288                         continue;
 289
 290                 pr_info("%2d: %s\n", i, tests[curr].desc);
 291         }
 292
 293         return 0;
 294 }
 295
 296 int cmd_test(int argc, const char **argv, const char *prefix __maybe_unused)
 297 {
 298         const char *test_usage[] = {
 299         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
 300         NULL,
 301         };
 302         const char *skip = NULL;
 303         const struct option test_options[] = {
 304         OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
 305         OPT_INCR('v', "verbose", &verbose,
 306                     "be more verbose (show symbol address, etc)"),
 307         OPT_END()
 308         };
 309         const char * const test_subcommands[] = { "list", NULL };
 310         struct intlist *skiplist = NULL;
 311         int ret = hists__init();
 312
 313         if (ret < 0)
 314                 return ret;
 315
 316         argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
 317         if (argc >= 1 && !strcmp(argv[0], "list"))
 318                 return perf_test__list(argc, argv);
 319
 320         symbol_conf.priv_size = sizeof(int);
 321         symbol_conf.sort_by_name = true;
 322         symbol_conf.try_vmlinux_path = true;
 323
 324         if (symbol__init(NULL) < 0)
 325                 return -1;
 326
 327         if (skip != NULL)
 328                 skiplist = intlist__new(skip);
 329
 330         return __cmd_test(argc, argv, skiplist);
 331 }