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