kernel/tools/perf/util/db-export.c

   1 /*
   2  * db-export.c: Support for exporting data suitable for import to a database
   3  * Copyright (c) 2014, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  */
  15
  16 #include <errno.h>
  17
  18 #include "evsel.h"
  19 #include "machine.h"
  20 #include "thread.h"
  21 #include "comm.h"
  22 #include "symbol.h"
  23 #include "event.h"
  24 #include "util.h"
  25 #include "thread-stack.h"
  26 #include "db-export.h"
  27
  28 struct deferred_export {
  29         struct list_head node;
  30         struct comm *comm;
  31 };
  32
  33 static int db_export__deferred(struct db_export *dbe)
  34 {
  35         struct deferred_export *de;
  36         int err;
  37
  38         while (!list_empty(&dbe->deferred)) {
  39                 de = list_entry(dbe->deferred.next, struct deferred_export,
  40                                 node);
  41                 err = dbe->export_comm(dbe, de->comm);
  42                 list_del(&de->node);
  43                 free(de);
  44                 if (err)
  45                         return err;
  46         }
  47
  48         return 0;
  49 }
  50
  51 static void db_export__free_deferred(struct db_export *dbe)
  52 {
  53         struct deferred_export *de;
  54
  55         while (!list_empty(&dbe->deferred)) {
  56                 de = list_entry(dbe->deferred.next, struct deferred_export,
  57                                 node);
  58                 list_del(&de->node);
  59                 free(de);
  60         }
  61 }
  62
  63 static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
  64 {
  65         struct deferred_export *de;
  66
  67         de = zalloc(sizeof(struct deferred_export));
  68         if (!de)
  69                 return -ENOMEM;
  70
  71         de->comm = comm;
  72         list_add_tail(&de->node, &dbe->deferred);
  73
  74         return 0;
  75 }
  76
  77 int db_export__init(struct db_export *dbe)
  78 {
  79         memset(dbe, 0, sizeof(struct db_export));
  80         INIT_LIST_HEAD(&dbe->deferred);
  81         return 0;
  82 }
  83
  84 int db_export__flush(struct db_export *dbe)
  85 {
  86         return db_export__deferred(dbe);
  87 }
  88
  89 void db_export__exit(struct db_export *dbe)
  90 {
  91         db_export__free_deferred(dbe);
  92         call_return_processor__free(dbe->crp);
  93         dbe->crp = NULL;
  94 }
  95
  96 int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
  97 {
  98         if (evsel->db_id)
  99                 return 0;
 100
 101         evsel->db_id = ++dbe->evsel_last_db_id;
 102
 103         if (dbe->export_evsel)
 104                 return dbe->export_evsel(dbe, evsel);
 105
 106         return 0;
 107 }
 108
 109 int db_export__machine(struct db_export *dbe, struct machine *machine)
 110 {
 111         if (machine->db_id)
 112                 return 0;
 113
 114         machine->db_id = ++dbe->machine_last_db_id;
 115
 116         if (dbe->export_machine)
 117                 return dbe->export_machine(dbe, machine);
 118
 119         return 0;
 120 }
 121
 122 int db_export__thread(struct db_export *dbe, struct thread *thread,
 123                       struct machine *machine, struct comm *comm)
 124 {
 125         struct thread *main_thread;
 126         u64 main_thread_db_id = 0;
 127         int err;
 128
 129         if (thread->db_id)
 130                 return 0;
 131
 132         thread->db_id = ++dbe->thread_last_db_id;
 133
 134         if (thread->pid_ != -1) {
 135                 if (thread->pid_ == thread->tid) {
 136                         main_thread = thread;
 137                 } else {
 138                         main_thread = machine__findnew_thread(machine,
 139                                                               thread->pid_,
 140                                                               thread->pid_);
 141                         if (!main_thread)
 142                                 return -ENOMEM;
 143                         err = db_export__thread(dbe, main_thread, machine,
 144                                                 comm);
 145                         if (err)
 146                                 goto out_put;
 147                         if (comm) {
 148                                 err = db_export__comm_thread(dbe, comm, thread);
 149                                 if (err)
 150                                         goto out_put;
 151                         }
 152                 }
 153                 main_thread_db_id = main_thread->db_id;
 154                 if (main_thread != thread)
 155                         thread__put(main_thread);
 156         }
 157
 158         if (dbe->export_thread)
 159                 return dbe->export_thread(dbe, thread, main_thread_db_id,
 160                                           machine);
 161
 162         return 0;
 163
 164 out_put:
 165         thread__put(main_thread);
 166         return err;
 167 }
 168
 169 int db_export__comm(struct db_export *dbe, struct comm *comm,
 170                     struct thread *main_thread)
 171 {
 172         int err;
 173
 174         if (comm->db_id)
 175                 return 0;
 176
 177         comm->db_id = ++dbe->comm_last_db_id;
 178
 179         if (dbe->export_comm) {
 180                 if (main_thread->comm_set)
 181                         err = dbe->export_comm(dbe, comm);
 182                 else
 183                         err = db_export__defer_comm(dbe, comm);
 184                 if (err)
 185                         return err;
 186         }
 187
 188         return db_export__comm_thread(dbe, comm, main_thread);
 189 }
 190
 191 int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
 192                            struct thread *thread)
 193 {
 194         u64 db_id;
 195
 196         db_id = ++dbe->comm_thread_last_db_id;
 197
 198         if (dbe->export_comm_thread)
 199                 return dbe->export_comm_thread(dbe, db_id, comm, thread);
 200
 201         return 0;
 202 }
 203
 204 int db_export__dso(struct db_export *dbe, struct dso *dso,
 205                    struct machine *machine)
 206 {
 207         if (dso->db_id)
 208                 return 0;
 209
 210         dso->db_id = ++dbe->dso_last_db_id;
 211
 212         if (dbe->export_dso)
 213                 return dbe->export_dso(dbe, dso, machine);
 214
 215         return 0;
 216 }
 217
 218 int db_export__symbol(struct db_export *dbe, struct symbol *sym,
 219                       struct dso *dso)
 220 {
 221         u64 *sym_db_id = symbol__priv(sym);
 222
 223         if (*sym_db_id)
 224                 return 0;
 225
 226         *sym_db_id = ++dbe->symbol_last_db_id;
 227
 228         if (dbe->export_symbol)
 229                 return dbe->export_symbol(dbe, sym, dso);
 230
 231         return 0;
 232 }
 233
 234 static struct thread *get_main_thread(struct machine *machine, struct thread *thread)
 235 {
 236         if (thread->pid_ == thread->tid)
 237                 return thread__get(thread);
 238
 239         if (thread->pid_ == -1)
 240                 return NULL;
 241
 242         return machine__find_thread(machine, thread->pid_, thread->pid_);
 243 }
 244
 245 static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
 246                           u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
 247 {
 248         int err;
 249
 250         if (al->map) {
 251                 struct dso *dso = al->map->dso;
 252
 253                 err = db_export__dso(dbe, dso, al->machine);
 254                 if (err)
 255                         return err;
 256                 *dso_db_id = dso->db_id;
 257
 258                 if (!al->sym) {
 259                         al->sym = symbol__new(al->addr, 0, 0, "unknown");
 260                         if (al->sym)
 261                                 symbols__insert(&dso->symbols[al->map->type],
 262                                                 al->sym);
 263                 }
 264
 265                 if (al->sym) {
 266                         u64 *db_id = symbol__priv(al->sym);
 267
 268                         err = db_export__symbol(dbe, al->sym, dso);
 269                         if (err)
 270                                 return err;
 271                         *sym_db_id = *db_id;
 272                         *offset = al->addr - al->sym->start;
 273                 }
 274         }
 275
 276         return 0;
 277 }
 278
 279 int db_export__branch_type(struct db_export *dbe, u32 branch_type,
 280                            const char *name)
 281 {
 282         if (dbe->export_branch_type)
 283                 return dbe->export_branch_type(dbe, branch_type, name);
 284
 285         return 0;
 286 }
 287
 288 int db_export__sample(struct db_export *dbe, union perf_event *event,
 289                       struct perf_sample *sample, struct perf_evsel *evsel,
 290                       struct addr_location *al)
 291 {
 292         struct thread* thread = al->thread;
 293         struct export_sample es = {
 294                 .event = event,
 295                 .sample = sample,
 296                 .evsel = evsel,
 297                 .al = al,
 298         };
 299         struct thread *main_thread;
 300         struct comm *comm = NULL;
 301         int err;
 302
 303         err = db_export__evsel(dbe, evsel);
 304         if (err)
 305                 return err;
 306
 307         err = db_export__machine(dbe, al->machine);
 308         if (err)
 309                 return err;
 310
 311         main_thread = get_main_thread(al->machine, thread);
 312         if (main_thread)
 313                 comm = machine__thread_exec_comm(al->machine, main_thread);
 314
 315         err = db_export__thread(dbe, thread, al->machine, comm);
 316         if (err)
 317                 goto out_put;
 318
 319         if (comm) {
 320                 err = db_export__comm(dbe, comm, main_thread);
 321                 if (err)
 322                         goto out_put;
 323                 es.comm_db_id = comm->db_id;
 324         }
 325
 326         es.db_id = ++dbe->sample_last_db_id;
 327
 328         err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
 329         if (err)
 330                 goto out_put;
 331
 332         if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
 333             sample_addr_correlates_sym(&evsel->attr)) {
 334                 struct addr_location addr_al;
 335
 336                 perf_event__preprocess_sample_addr(event, sample, thread, &addr_al);
 337                 err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
 338                                      &es.addr_sym_db_id, &es.addr_offset);
 339                 if (err)
 340                         goto out_put;
 341                 if (dbe->crp) {
 342                         err = thread_stack__process(thread, comm, sample, al,
 343                                                     &addr_al, es.db_id,
 344                                                     dbe->crp);
 345                         if (err)
 346                                 goto out_put;
 347                 }
 348         }
 349
 350         if (dbe->export_sample)
 351                 err = dbe->export_sample(dbe, &es);
 352
 353 out_put:
 354         thread__put(main_thread);
 355         return err;
 356 }
 357
 358 static struct {
 359         u32 branch_type;
 360         const char *name;
 361 } branch_types[] = {
 362         {0, "no branch"},
 363         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
 364         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
 365         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
 366         {PERF_IP_FLAG_BRANCH, "unconditional jump"},
 367         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
 368          "software interrupt"},
 369         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
 370          "return from interrupt"},
 371         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
 372          "system call"},
 373         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
 374          "return from system call"},
 375         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
 376         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
 377          PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
 378         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
 379         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
 380         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
 381         {0, NULL}
 382 };
 383
 384 int db_export__branch_types(struct db_export *dbe)
 385 {
 386         int i, err = 0;
 387
 388         for (i = 0; branch_types[i].name ; i++) {
 389                 err = db_export__branch_type(dbe, branch_types[i].branch_type,
 390                                              branch_types[i].name);
 391                 if (err)
 392                         break;
 393         }
 394         return err;
 395 }
 396
 397 int db_export__call_path(struct db_export *dbe, struct call_path *cp)
 398 {
 399         int err;
 400
 401         if (cp->db_id)
 402                 return 0;
 403
 404         if (cp->parent) {
 405                 err = db_export__call_path(dbe, cp->parent);
 406                 if (err)
 407                         return err;
 408         }
 409
 410         cp->db_id = ++dbe->call_path_last_db_id;
 411
 412         if (dbe->export_call_path)
 413                 return dbe->export_call_path(dbe, cp);
 414
 415         return 0;
 416 }
 417
 418 int db_export__call_return(struct db_export *dbe, struct call_return *cr)
 419 {
 420         int err;
 421
 422         if (cr->db_id)
 423                 return 0;
 424
 425         err = db_export__call_path(dbe, cr->cp);
 426         if (err)
 427                 return err;
 428
 429         cr->db_id = ++dbe->call_return_last_db_id;
 430
 431         if (dbe->export_call_return)
 432                 return dbe->export_call_return(dbe, cr);
 433
 434         return 0;
 435 }