SAFE public projects git trees. - safe/jmp/linux-2.6/blob - tools/perf/builtin-trace.c

   1 #include "builtin.h"
   2
   3 #include "util/util.h"
   4 #include "util/cache.h"
   5 #include "util/symbol.h"
   6 #include "util/thread.h"
   7 #include "util/header.h"
   8 #include "util/exec_cmd.h"
   9 #include "util/trace-event.h"
  10 #include "util/session.h"
  11
  12 static char const               *script_name;
  13 static char const               *generate_script_lang;
  14
  15 static int default_start_script(const char *script __attribute((unused)))
  16 {
  17         return 0;
  18 }
  19
  20 static int default_stop_script(void)
  21 {
  22         return 0;
  23 }
  24
  25 static int default_generate_script(const char *outfile __attribute ((unused)))
  26 {
  27         return 0;
  28 }
  29
  30 static struct scripting_ops default_scripting_ops = {
  31         .start_script           = default_start_script,
  32         .stop_script            = default_stop_script,
  33         .process_event          = print_event,
  34         .generate_script        = default_generate_script,
  35 };
  36
  37 static struct scripting_ops     *scripting_ops;
  38
  39 static void setup_scripting(void)
  40 {
  41         /* make sure PERF_EXEC_PATH is set for scripts */
  42         perf_set_argv_exec_path(perf_exec_path());
  43
  44         setup_perl_scripting();
  45
  46         scripting_ops = &default_scripting_ops;
  47 }
  48
  49 static int cleanup_scripting(void)
  50 {
  51         return scripting_ops->stop_script();
  52 }
  53
  54 #include "util/parse-options.h"
  55
  56 #include "perf.h"
  57 #include "util/debug.h"
  58
  59 #include "util/trace-event.h"
  60 #include "util/exec_cmd.h"
  61
  62 static char const               *input_name = "perf.data";
  63
  64 static u64                      sample_type;
  65
  66 static int process_sample_event(event_t *event, struct perf_session *session __used)
  67 {
  68         struct sample_data data;
  69         struct thread *thread;
  70
  71         memset(&data, 0, sizeof(data));
  72         data.time = -1;
  73         data.cpu = -1;
  74         data.period = 1;
  75
  76         event__parse_sample(event, sample_type, &data);
  77
  78         dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
  79                 event->header.misc,
  80                 data.pid, data.tid,
  81                 (void *)(long)data.ip,
  82                 (long long)data.period);
  83
  84         thread = threads__findnew(event->ip.pid);
  85         if (thread == NULL) {
  86                 pr_debug("problem processing %d event, skipping it.\n",
  87                          event->header.type);
  88                 return -1;
  89         }
  90
  91         if (sample_type & PERF_SAMPLE_RAW) {
  92                 /*
  93                  * FIXME: better resolve from pid from the struct trace_entry
  94                  * field, although it should be the same than this perf
  95                  * event pid
  96                  */
  97                 scripting_ops->process_event(data.cpu, data.raw_data,
  98                                              data.raw_size,
  99                                              data.time, thread->comm);
 100         }
 101         event__stats.total += data.period;
 102
 103         return 0;
 104 }
 105
 106 static int sample_type_check(u64 type)
 107 {
 108         sample_type = type;
 109
 110         if (!(sample_type & PERF_SAMPLE_RAW)) {
 111                 fprintf(stderr,
 112                         "No trace sample to read. Did you call perf record "
 113                         "without -R?");
 114                 return -1;
 115         }
 116
 117         return 0;
 118 }
 119
 120 static struct perf_event_ops event_ops = {
 121         .process_sample_event   = process_sample_event,
 122         .process_comm_event     = event__process_comm,
 123         .sample_type_check      = sample_type_check,
 124 };
 125
 126 static int __cmd_trace(struct perf_session *session)
 127 {
 128         return perf_session__process_events(session, &event_ops, 0,
 129                                             &event__cwdlen, &event__cwd);
 130 }
 131
 132 struct script_spec {
 133         struct list_head        node;
 134         struct scripting_ops    *ops;
 135         char                    spec[0];
 136 };
 137
 138 LIST_HEAD(script_specs);
 139
 140 static struct script_spec *script_spec__new(const char *spec,
 141                                             struct scripting_ops *ops)
 142 {
 143         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
 144
 145         if (s != NULL) {
 146                 strcpy(s->spec, spec);
 147                 s->ops = ops;
 148         }
 149
 150         return s;
 151 }
 152
 153 static void script_spec__delete(struct script_spec *s)
 154 {
 155         free(s->spec);
 156         free(s);
 157 }
 158
 159 static void script_spec__add(struct script_spec *s)
 160 {
 161         list_add_tail(&s->node, &script_specs);
 162 }
 163
 164 static struct script_spec *script_spec__find(const char *spec)
 165 {
 166         struct script_spec *s;
 167
 168         list_for_each_entry(s, &script_specs, node)
 169                 if (strcasecmp(s->spec, spec) == 0)
 170                         return s;
 171         return NULL;
 172 }
 173
 174 static struct script_spec *script_spec__findnew(const char *spec,
 175                                                 struct scripting_ops *ops)
 176 {
 177         struct script_spec *s = script_spec__find(spec);
 178
 179         if (s)
 180                 return s;
 181
 182         s = script_spec__new(spec, ops);
 183         if (!s)
 184                 goto out_delete_spec;
 185
 186         script_spec__add(s);
 187
 188         return s;
 189
 190 out_delete_spec:
 191         script_spec__delete(s);
 192
 193         return NULL;
 194 }
 195
 196 int script_spec_register(const char *spec, struct scripting_ops *ops)
 197 {
 198         struct script_spec *s;
 199
 200         s = script_spec__find(spec);
 201         if (s)
 202                 return -1;
 203
 204         s = script_spec__findnew(spec, ops);
 205         if (!s)
 206                 return -1;
 207
 208         return 0;
 209 }
 210
 211 static struct scripting_ops *script_spec__lookup(const char *spec)
 212 {
 213         struct script_spec *s = script_spec__find(spec);
 214         if (!s)
 215                 return NULL;
 216
 217         return s->ops;
 218 }
 219
 220 static void list_available_languages(void)
 221 {
 222         struct script_spec *s;
 223
 224         fprintf(stderr, "\n");
 225         fprintf(stderr, "Scripting language extensions (used in "
 226                 "perf trace -s [spec:]script.[spec]):\n\n");
 227
 228         list_for_each_entry(s, &script_specs, node)
 229                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 230
 231         fprintf(stderr, "\n");
 232 }
 233
 234 static int parse_scriptname(const struct option *opt __used,
 235                             const char *str, int unset __used)
 236 {
 237         char spec[PATH_MAX];
 238         const char *script, *ext;
 239         int len;
 240
 241         if (strcmp(str, "list") == 0) {
 242                 list_available_languages();
 243                 return 0;
 244         }
 245
 246         script = strchr(str, ':');
 247         if (script) {
 248                 len = script - str;
 249                 if (len >= PATH_MAX) {
 250                         fprintf(stderr, "invalid language specifier");
 251                         return -1;
 252                 }
 253                 strncpy(spec, str, len);
 254                 spec[len] = '\0';
 255                 scripting_ops = script_spec__lookup(spec);
 256                 if (!scripting_ops) {
 257                         fprintf(stderr, "invalid language specifier");
 258                         return -1;
 259                 }
 260                 script++;
 261         } else {
 262                 script = str;
 263                 ext = strchr(script, '.');
 264                 if (!ext) {
 265                         fprintf(stderr, "invalid script extension");
 266                         return -1;
 267                 }
 268                 scripting_ops = script_spec__lookup(++ext);
 269                 if (!scripting_ops) {
 270                         fprintf(stderr, "invalid script extension");
 271                         return -1;
 272                 }
 273         }
 274
 275         script_name = strdup(script);
 276
 277         return 0;
 278 }
 279
 280 static const char * const annotate_usage[] = {
 281         "perf trace [<options>] <command>",
 282         NULL
 283 };
 284
 285 static const struct option options[] = {
 286         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 287                     "dump raw trace in ASCII"),
 288         OPT_BOOLEAN('v', "verbose", &verbose,
 289                     "be more verbose (show symbol address, etc)"),
 290         OPT_BOOLEAN('l', "latency", &latency_format,
 291                     "show latency attributes (irqs/preemption disabled, etc)"),
 292         OPT_CALLBACK('s', "script", NULL, "name",
 293                      "script file name (lang:script name, script name, or *)",
 294                      parse_scriptname),
 295         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
 296                    "generate perf-trace.xx script in specified language"),
 297
 298         OPT_END()
 299 };
 300
 301 int cmd_trace(int argc, const char **argv, const char *prefix __used)
 302 {
 303         int err;
 304         struct perf_session *session;
 305
 306         symbol__init(0);
 307
 308         setup_scripting();
 309
 310         argc = parse_options(argc, argv, options, annotate_usage, 0);
 311         if (argc) {
 312                 /*
 313                  * Special case: if there's an argument left then assume tha
 314                  * it's a symbol filter:
 315                  */
 316                 if (argc > 1)
 317                         usage_with_options(annotate_usage, options);
 318         }
 319
 320         setup_pager();
 321
 322         session = perf_session__new(input_name, O_RDONLY, 0);
 323         if (session == NULL)
 324                 return -ENOMEM;
 325
 326         if (generate_script_lang) {
 327                 struct stat perf_stat;
 328
 329                 int input = open(input_name, O_RDONLY);
 330                 if (input < 0) {
 331                         perror("failed to open file");
 332                         exit(-1);
 333                 }
 334
 335                 err = fstat(input, &perf_stat);
 336                 if (err < 0) {
 337                         perror("failed to stat file");
 338                         exit(-1);
 339                 }
 340
 341                 if (!perf_stat.st_size) {
 342                         fprintf(stderr, "zero-sized file, nothing to do!\n");
 343                         exit(0);
 344                 }
 345
 346                 scripting_ops = script_spec__lookup(generate_script_lang);
 347                 if (!scripting_ops) {
 348                         fprintf(stderr, "invalid language specifier");
 349                         return -1;
 350                 }
 351
 352                 perf_header__read(&session->header, input);
 353                 err = scripting_ops->generate_script("perf-trace");
 354                 goto out;
 355         }
 356
 357         if (script_name) {
 358                 err = scripting_ops->start_script(script_name);
 359                 if (err)
 360                         goto out;
 361         }
 362
 363         err = __cmd_trace(session);
 364
 365         perf_session__delete(session);
 366         cleanup_scripting();
 367 out:
 368         return err;
 369 }