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)
  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 = perf_session__findnew(session, 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);
 129 }
 130
 131 struct script_spec {
 132         struct list_head        node;
 133         struct scripting_ops    *ops;
 134         char                    spec[0];
 135 };
 136
 137 LIST_HEAD(script_specs);
 138
 139 static struct script_spec *script_spec__new(const char *spec,
 140                                             struct scripting_ops *ops)
 141 {
 142         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
 143
 144         if (s != NULL) {
 145                 strcpy(s->spec, spec);
 146                 s->ops = ops;
 147         }
 148
 149         return s;
 150 }
 151
 152 static void script_spec__delete(struct script_spec *s)
 153 {
 154         free(s->spec);
 155         free(s);
 156 }
 157
 158 static void script_spec__add(struct script_spec *s)
 159 {
 160         list_add_tail(&s->node, &script_specs);
 161 }
 162
 163 static struct script_spec *script_spec__find(const char *spec)
 164 {
 165         struct script_spec *s;
 166
 167         list_for_each_entry(s, &script_specs, node)
 168                 if (strcasecmp(s->spec, spec) == 0)
 169                         return s;
 170         return NULL;
 171 }
 172
 173 static struct script_spec *script_spec__findnew(const char *spec,
 174                                                 struct scripting_ops *ops)
 175 {
 176         struct script_spec *s = script_spec__find(spec);
 177
 178         if (s)
 179                 return s;
 180
 181         s = script_spec__new(spec, ops);
 182         if (!s)
 183                 goto out_delete_spec;
 184
 185         script_spec__add(s);
 186
 187         return s;
 188
 189 out_delete_spec:
 190         script_spec__delete(s);
 191
 192         return NULL;
 193 }
 194
 195 int script_spec_register(const char *spec, struct scripting_ops *ops)
 196 {
 197         struct script_spec *s;
 198
 199         s = script_spec__find(spec);
 200         if (s)
 201                 return -1;
 202
 203         s = script_spec__findnew(spec, ops);
 204         if (!s)
 205                 return -1;
 206
 207         return 0;
 208 }
 209
 210 static struct scripting_ops *script_spec__lookup(const char *spec)
 211 {
 212         struct script_spec *s = script_spec__find(spec);
 213         if (!s)
 214                 return NULL;
 215
 216         return s->ops;
 217 }
 218
 219 static void list_available_languages(void)
 220 {
 221         struct script_spec *s;
 222
 223         fprintf(stderr, "\n");
 224         fprintf(stderr, "Scripting language extensions (used in "
 225                 "perf trace -s [spec:]script.[spec]):\n\n");
 226
 227         list_for_each_entry(s, &script_specs, node)
 228                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 229
 230         fprintf(stderr, "\n");
 231 }
 232
 233 static int parse_scriptname(const struct option *opt __used,
 234                             const char *str, int unset __used)
 235 {
 236         char spec[PATH_MAX];
 237         const char *script, *ext;
 238         int len;
 239
 240         if (strcmp(str, "list") == 0) {
 241                 list_available_languages();
 242                 return 0;
 243         }
 244
 245         script = strchr(str, ':');
 246         if (script) {
 247                 len = script - str;
 248                 if (len >= PATH_MAX) {
 249                         fprintf(stderr, "invalid language specifier");
 250                         return -1;
 251                 }
 252                 strncpy(spec, str, len);
 253                 spec[len] = '\0';
 254                 scripting_ops = script_spec__lookup(spec);
 255                 if (!scripting_ops) {
 256                         fprintf(stderr, "invalid language specifier");
 257                         return -1;
 258                 }
 259                 script++;
 260         } else {
 261                 script = str;
 262                 ext = strchr(script, '.');
 263                 if (!ext) {
 264                         fprintf(stderr, "invalid script extension");
 265                         return -1;
 266                 }
 267                 scripting_ops = script_spec__lookup(++ext);
 268                 if (!scripting_ops) {
 269                         fprintf(stderr, "invalid script extension");
 270                         return -1;
 271                 }
 272         }
 273
 274         script_name = strdup(script);
 275
 276         return 0;
 277 }
 278
 279 static const char * const annotate_usage[] = {
 280         "perf trace [<options>] <command>",
 281         NULL
 282 };
 283
 284 static const struct option options[] = {
 285         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 286                     "dump raw trace in ASCII"),
 287         OPT_BOOLEAN('v', "verbose", &verbose,
 288                     "be more verbose (show symbol address, etc)"),
 289         OPT_BOOLEAN('l', "latency", &latency_format,
 290                     "show latency attributes (irqs/preemption disabled, etc)"),
 291         OPT_CALLBACK('s', "script", NULL, "name",
 292                      "script file name (lang:script name, script name, or *)",
 293                      parse_scriptname),
 294         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
 295                    "generate perf-trace.xx script in specified language"),
 296
 297         OPT_END()
 298 };
 299
 300 int cmd_trace(int argc, const char **argv, const char *prefix __used)
 301 {
 302         int err;
 303         struct perf_session *session;
 304
 305         symbol__init(0);
 306
 307         setup_scripting();
 308
 309         argc = parse_options(argc, argv, options, annotate_usage, 0);
 310         if (argc) {
 311                 /*
 312                  * Special case: if there's an argument left then assume tha
 313                  * it's a symbol filter:
 314                  */
 315                 if (argc > 1)
 316                         usage_with_options(annotate_usage, options);
 317         }
 318
 319         setup_pager();
 320
 321         session = perf_session__new(input_name, O_RDONLY, 0, NULL);
 322         if (session == NULL)
 323                 return -ENOMEM;
 324
 325         if (generate_script_lang) {
 326                 struct stat perf_stat;
 327
 328                 int input = open(input_name, O_RDONLY);
 329                 if (input < 0) {
 330                         perror("failed to open file");
 331                         exit(-1);
 332                 }
 333
 334                 err = fstat(input, &perf_stat);
 335                 if (err < 0) {
 336                         perror("failed to stat file");
 337                         exit(-1);
 338                 }
 339
 340                 if (!perf_stat.st_size) {
 341                         fprintf(stderr, "zero-sized file, nothing to do!\n");
 342                         exit(0);
 343                 }
 344
 345                 scripting_ops = script_spec__lookup(generate_script_lang);
 346                 if (!scripting_ops) {
 347                         fprintf(stderr, "invalid language specifier");
 348                         return -1;
 349                 }
 350
 351                 perf_header__read(&session->header, input);
 352                 err = scripting_ops->generate_script("perf-trace");
 353                 goto out;
 354         }
 355
 356         if (script_name) {
 357                 err = scripting_ops->start_script(script_name);
 358                 if (err)
 359                         goto out;
 360         }
 361
 362         err = __cmd_trace(session);
 363
 364         perf_session__delete(session);
 365         cleanup_scripting();
 366 out:
 367         return err;
 368 }