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
   9 static char const               *script_name;
  10 static char const               *generate_script_lang;
  11
  12 static int default_start_script(const char *script __attribute((unused)))
  13 {
  14         return 0;
  15 }
  16
  17 static int default_stop_script(void)
  18 {
  19         return 0;
  20 }
  21
  22 static int default_generate_script(const char *outfile __attribute ((unused)))
  23 {
  24         return 0;
  25 }
  26
  27 static struct scripting_ops default_scripting_ops = {
  28         .start_script           = default_start_script,
  29         .stop_script            = default_stop_script,
  30         .process_event          = print_event,
  31         .generate_script        = default_generate_script,
  32 };
  33
  34 static struct scripting_ops     *scripting_ops;
  35
  36 static void setup_scripting(void)
  37 {
  38         /* make sure PERF_EXEC_PATH is set for scripts */
  39         perf_set_argv_exec_path(perf_exec_path());
  40
  41         scripting_ops = &default_scripting_ops;
  42 }
  43
  44 static int cleanup_scripting(void)
  45 {
  46         return scripting_ops->stop_script();
  47 }
  48
  49 #include "util/parse-options.h"
  50
  51 #include "perf.h"
  52 #include "util/debug.h"
  53
  54 #include "util/trace-event.h"
  55 #include "util/data_map.h"
  56 #include "util/exec_cmd.h"
  57
  58 static char const               *input_name = "perf.data";
  59
  60 static struct perf_header       *header;
  61 static u64                      sample_type;
  62
  63 static int process_sample_event(event_t *event)
  64 {
  65         u64 ip = event->ip.ip;
  66         u64 timestamp = -1;
  67         u32 cpu = -1;
  68         u64 period = 1;
  69         void *more_data = event->ip.__more_data;
  70         struct thread *thread = threads__findnew(event->ip.pid);
  71
  72         if (sample_type & PERF_SAMPLE_TIME) {
  73                 timestamp = *(u64 *)more_data;
  74                 more_data += sizeof(u64);
  75         }
  76
  77         if (sample_type & PERF_SAMPLE_CPU) {
  78                 cpu = *(u32 *)more_data;
  79                 more_data += sizeof(u32);
  80                 more_data += sizeof(u32); /* reserved */
  81         }
  82
  83         if (sample_type & PERF_SAMPLE_PERIOD) {
  84                 period = *(u64 *)more_data;
  85                 more_data += sizeof(u64);
  86         }
  87
  88         dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
  89                 event->header.misc,
  90                 event->ip.pid, event->ip.tid,
  91                 (void *)(long)ip,
  92                 (long long)period);
  93
  94         if (thread == NULL) {
  95                 pr_debug("problem processing %d event, skipping it.\n",
  96                          event->header.type);
  97                 return -1;
  98         }
  99
 100         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 101
 102         if (sample_type & PERF_SAMPLE_RAW) {
 103                 struct {
 104                         u32 size;
 105                         char data[0];
 106                 } *raw = more_data;
 107
 108                 /*
 109                  * FIXME: better resolve from pid from the struct trace_entry
 110                  * field, although it should be the same than this perf
 111                  * event pid
 112                  */
 113                 scripting_ops->process_event(cpu, raw->data, raw->size,
 114                                              timestamp, thread->comm);
 115         }
 116         event__stats.total += period;
 117
 118         return 0;
 119 }
 120
 121 static int sample_type_check(u64 type)
 122 {
 123         sample_type = type;
 124
 125         if (!(sample_type & PERF_SAMPLE_RAW)) {
 126                 fprintf(stderr,
 127                         "No trace sample to read. Did you call perf record "
 128                         "without -R?");
 129                 return -1;
 130         }
 131
 132         return 0;
 133 }
 134
 135 static struct perf_file_handler file_handler = {
 136         .process_sample_event   = process_sample_event,
 137         .process_comm_event     = event__process_comm,
 138         .sample_type_check      = sample_type_check,
 139 };
 140
 141 static int __cmd_trace(void)
 142 {
 143         register_idle_thread();
 144         register_perf_file_handler(&file_handler);
 145
 146         return mmap_dispatch_perf_file(&header, input_name,
 147                                        0, 0, &event__cwdlen, &event__cwd);
 148 }
 149
 150 struct script_spec {
 151         struct list_head        node;
 152         struct scripting_ops    *ops;
 153         char                    spec[0];
 154 };
 155
 156 LIST_HEAD(script_specs);
 157
 158 static struct script_spec *script_spec__new(const char *spec,
 159                                             struct scripting_ops *ops)
 160 {
 161         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
 162
 163         if (s != NULL) {
 164                 strcpy(s->spec, spec);
 165                 s->ops = ops;
 166         }
 167
 168         return s;
 169 }
 170
 171 static void script_spec__delete(struct script_spec *s)
 172 {
 173         free(s->spec);
 174         free(s);
 175 }
 176
 177 static void script_spec__add(struct script_spec *s)
 178 {
 179         list_add_tail(&s->node, &script_specs);
 180 }
 181
 182 static struct script_spec *script_spec__find(const char *spec)
 183 {
 184         struct script_spec *s;
 185
 186         list_for_each_entry(s, &script_specs, node)
 187                 if (strcasecmp(s->spec, spec) == 0)
 188                         return s;
 189         return NULL;
 190 }
 191
 192 static struct script_spec *script_spec__findnew(const char *spec,
 193                                                 struct scripting_ops *ops)
 194 {
 195         struct script_spec *s = script_spec__find(spec);
 196
 197         if (s)
 198                 return s;
 199
 200         s = script_spec__new(spec, ops);
 201         if (!s)
 202                 goto out_delete_spec;
 203
 204         script_spec__add(s);
 205
 206         return s;
 207
 208 out_delete_spec:
 209         script_spec__delete(s);
 210
 211         return NULL;
 212 }
 213
 214 int script_spec_register(const char *spec, struct scripting_ops *ops)
 215 {
 216         struct script_spec *s;
 217
 218         s = script_spec__find(spec);
 219         if (s)
 220                 return -1;
 221
 222         s = script_spec__findnew(spec, ops);
 223         if (!s)
 224                 return -1;
 225
 226         return 0;
 227 }
 228
 229 static struct scripting_ops *script_spec__lookup(const char *spec)
 230 {
 231         struct script_spec *s = script_spec__find(spec);
 232         if (!s)
 233                 return NULL;
 234
 235         return s->ops;
 236 }
 237
 238 static void list_available_languages(void)
 239 {
 240         struct script_spec *s;
 241
 242         fprintf(stderr, "\n");
 243         fprintf(stderr, "Scripting language extensions (used in "
 244                 "perf trace -s [spec:]script.[spec]):\n\n");
 245
 246         list_for_each_entry(s, &script_specs, node)
 247                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 248
 249         fprintf(stderr, "\n");
 250 }
 251
 252 static int parse_scriptname(const struct option *opt __used,
 253                             const char *str, int unset __used)
 254 {
 255         char spec[PATH_MAX];
 256         const char *script, *ext;
 257         int len;
 258
 259         if (strcmp(str, "list") == 0) {
 260                 list_available_languages();
 261                 return 0;
 262         }
 263
 264         script = strchr(str, ':');
 265         if (script) {
 266                 len = script - str;
 267                 if (len >= PATH_MAX) {
 268                         fprintf(stderr, "invalid language specifier");
 269                         return -1;
 270                 }
 271                 strncpy(spec, str, len);
 272                 spec[len] = '\0';
 273                 scripting_ops = script_spec__lookup(spec);
 274                 if (!scripting_ops) {
 275                         fprintf(stderr, "invalid language specifier");
 276                         return -1;
 277                 }
 278                 script++;
 279         } else {
 280                 script = str;
 281                 ext = strchr(script, '.');
 282                 if (!ext) {
 283                         fprintf(stderr, "invalid script extension");
 284                         return -1;
 285                 }
 286                 scripting_ops = script_spec__lookup(++ext);
 287                 if (!scripting_ops) {
 288                         fprintf(stderr, "invalid script extension");
 289                         return -1;
 290                 }
 291         }
 292
 293         script_name = strdup(script);
 294
 295         return 0;
 296 }
 297
 298 static const char * const annotate_usage[] = {
 299         "perf trace [<options>] <command>",
 300         NULL
 301 };
 302
 303 static const struct option options[] = {
 304         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 305                     "dump raw trace in ASCII"),
 306         OPT_BOOLEAN('v', "verbose", &verbose,
 307                     "be more verbose (show symbol address, etc)"),
 308         OPT_BOOLEAN('l', "latency", &latency_format,
 309                     "show latency attributes (irqs/preemption disabled, etc)"),
 310         OPT_CALLBACK('s', "script", NULL, "name",
 311                      "script file name (lang:script name, script name, or *)",
 312                      parse_scriptname),
 313         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
 314                    "generate perf-trace.xx script in specified language"),
 315
 316         OPT_END()
 317 };
 318
 319 int cmd_trace(int argc, const char **argv, const char *prefix __used)
 320 {
 321         int err;
 322
 323         symbol__init(0);
 324
 325         setup_scripting();
 326
 327         argc = parse_options(argc, argv, options, annotate_usage, 0);
 328         if (argc) {
 329                 /*
 330                  * Special case: if there's an argument left then assume tha
 331                  * it's a symbol filter:
 332                  */
 333                 if (argc > 1)
 334                         usage_with_options(annotate_usage, options);
 335         }
 336
 337         setup_pager();
 338
 339         if (generate_script_lang) {
 340                 struct stat perf_stat;
 341
 342                 int input = open(input_name, O_RDONLY);
 343                 if (input < 0) {
 344                         perror("failed to open file");
 345                         exit(-1);
 346                 }
 347
 348                 err = fstat(input, &perf_stat);
 349                 if (err < 0) {
 350                         perror("failed to stat file");
 351                         exit(-1);
 352                 }
 353
 354                 if (!perf_stat.st_size) {
 355                         fprintf(stderr, "zero-sized file, nothing to do!\n");
 356                         exit(0);
 357                 }
 358
 359                 scripting_ops = script_spec__lookup(generate_script_lang);
 360                 if (!scripting_ops) {
 361                         fprintf(stderr, "invalid language specifier");
 362                         return -1;
 363                 }
 364
 365                 header = perf_header__new();
 366                 if (header == NULL)
 367                         return -1;
 368
 369                 perf_header__read(header, input);
 370                 err = scripting_ops->generate_script("perf-trace");
 371                 goto out;
 372         }
 373
 374         if (script_name) {
 375                 err = scripting_ops->start_script(script_name);
 376                 if (err)
 377                         goto out;
 378         }
 379
 380         err = __cmd_trace();
 381
 382         cleanup_scripting();
 383 out:
 384         return err;
 385 }