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         u64 main_thread_db_id = 0;
 126         int err;
 127
 128         if (thread->db_id)
 129                 return 0;
 130
 131         thread->db_id = ++dbe->thread_last_db_id;
 132
 133         if (thread->pid_ != -1) {
 134                 struct thread *main_thread;
 135
 136                 if (thread->pid_ == thread->tid) {
 137                         main_thread = thread;
 138                 } else {
 139                         main_thread = machine__findnew_thread(machine,
 140                                                               thread->pid_,
 141                                                               thread->pid_);
 142                         if (!main_thread)
 143                                 return -ENOMEM;
 144                         err = db_export__thread(dbe, main_thread, machine,
 145                                                 comm);
 146                         if (err)
 147                                 return err;
 148                         if (comm) {
 149                                 err = db_export__comm_thread(dbe, comm, thread);
 150                                 if (err)
 151                                         return err;
 152                         }
 153                 }
 154                 main_thread_db_id = main_thread->db_id;
 155         }
 156
 157         if (dbe->export_thread)
 158                 return dbe->export_thread(dbe, thread, main_thread_db_id,
 159                                           machine);
 160
 161         return 0;
 162 }
 163
 164 int db_export__comm(struct db_export *dbe, struct comm *comm,
 165                     struct thread *main_thread)
 166 {
 167         int err;
 168
 169         if (comm->db_id)
 170                 return 0;
 171
 172         comm->db_id = ++dbe->comm_last_db_id;
 173
 174         if (dbe->export_comm) {
 175                 if (main_thread->comm_set)
 176                         err = dbe->export_comm(dbe, comm);
 177                 else
 178                         err = db_export__defer_comm(dbe, comm);
 179                 if (err)
 180                         return err;
 181         }
 182
 183         return db_export__comm_thread(dbe, comm, main_thread);
 184 }
 185
 186 int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
 187                            struct thread *thread)
 188 {
 189         u64 db_id;
 190
 191         db_id = ++dbe->comm_thread_last_db_id;
 192
 193         if (dbe->export_comm_thread)
 194                 return dbe->export_comm_thread(dbe, db_id, comm, thread);
 195
 196         return 0;
 197 }
 198
 199 int db_export__dso(struct db_export *dbe, struct dso *dso,
 200                    struct machine *machine)
 201 {
 202         if (dso->db_id)
 203                 return 0;
 204
 205         dso->db_id = ++dbe->dso_last_db_id;
 206
 207         if (dbe->export_dso)
 208                 return dbe->export_dso(dbe, dso, machine);
 209
 210         return 0;
 211 }
 212
 213 int db_export__symbol(struct db_export *dbe, struct symbol *sym,
 214                       struct dso *dso)
 215 {
 216         u64 *sym_db_id = symbol__priv(sym);
 217
 218         if (*sym_db_id)
 219                 return 0;
 220
 221         *sym_db_id = ++dbe->symbol_last_db_id;
 222
 223         if (dbe->export_symbol)
 224                 return dbe->export_symbol(dbe, sym, dso);
 225
 226         return 0;
 227 }
 228
 229 static struct thread *get_main_thread(struct machine *machine, struct thread *thread)
 230 {
 231         if (thread->pid_ == thread->tid)
 232                 return thread;
 233
 234         if (thread->pid_ == -1)
 235                 return NULL;
 236
 237         return machine__find_thread(machine, thread->pid_, thread->pid_);
 238 }
 239
 240 static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
 241                           u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
 242 {
 243         int err;
 244
 245         if (al->map) {
 246                 struct dso *dso = al->map->dso;
 247
 248                 err = db_export__dso(dbe, dso, al->machine);
 249                 if (err)
 250                         return err;
 251                 *dso_db_id = dso->db_id;
 252
 253                 if (!al->sym) {
 254                         al->sym = symbol__new(al->addr, 0, 0, "unknown");
 255                         if (al->sym)
 256                                 symbols__insert(&dso->symbols[al->map->type],
 257                                                 al->sym);
 258                 }
 259
 260                 if (al->sym) {
 261                         u64 *db_id = symbol__priv(al->sym);
 262
 263                         err = db_export__symbol(dbe, al->sym, dso);
 264                         if (err)
 265                                 return err;
 266                         *sym_db_id = *db_id;
 267                         *offset = al->addr - al->sym->start;
 268                 }
 269         }
 270
 271         return 0;
 272 }
 273
 274 int db_export__branch_type(struct db_export *dbe, u32 branch_type,
 275                            const char *name)
 276 {
 277         if (dbe->export_branch_type)
 278                 return dbe->export_branch_type(dbe, branch_type, name);
 279
 280         return 0;
 281 }
 282
 283 int db_export__sample(struct db_export *dbe, union perf_event *event,
 284                       struct perf_sample *sample, struct perf_evsel *evsel,
 285                       struct addr_location *al)
 286 {
 287         struct thread* thread = al->thread;
 288         struct export_sample es = {
 289                 .event = event,
 290                 .sample = sample,
 291                 .evsel = evsel,
 292                 .al = al,
 293         };
 294         struct thread *main_thread;
 295         struct comm *comm = NULL;
 296         int err;
 297
 298         err = db_export__evsel(dbe, evsel);
 299         if (err)
 300                 return err;
 301
 302         err = db_export__machine(dbe, al->machine);
 303         if (err)
 304                 return err;
 305
 306         main_thread = get_main_thread(al->machine, thread);
 307         if (main_thread)
 308                 comm = machine__thread_exec_comm(al->machine, main_thread);
 309
 310         err = db_export__thread(dbe, thread, al->machine, comm);
 311         if (err)
 312                 return err;
 313
 314         if (comm) {
 315                 err = db_export__comm(dbe, comm, main_thread);
 316                 if (err)
 317                         return err;
 318                 es.comm_db_id = comm->db_id;
 319         }
 320
 321         es.db_id = ++dbe->sample_last_db_id;
 322
 323         err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
 324         if (err)
 325                 return err;
 326
 327         if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
 328             sample_addr_correlates_sym(&evsel->attr)) {
 329                 struct addr_location addr_al;
 330
 331                 perf_event__preprocess_sample_addr(event, sample, thread, &addr_al);
 332                 err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
 333                                      &es.addr_sym_db_id, &es.addr_offset);
 334                 if (err)
 335                         return err;
 336                 if (dbe->crp) {
 337                         err = thread_stack__process(thread, comm, sample, al,
 338                                                     &addr_al, es.db_id,
 339                                                     dbe->crp);
 340                         if (err)
 341                                 return err;
 342                 }
 343         }
 344
 345         if (dbe->export_sample)
 346                 return dbe->export_sample(dbe, &es);
 347
 348         return 0;
 349 }
 350
 351 static struct {
 352         u32 branch_type;
 353         const char *name;
 354 } branch_types[] = {
 355         {0, "no branch"},
 356         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
 357         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
 358         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
 359         {PERF_IP_FLAG_BRANCH, "unconditional jump"},
 360         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
 361          "software interrupt"},
 362         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
 363          "return from interrupt"},
 364         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
 365          "system call"},
 366         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
 367          "return from system call"},
 368         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
 369         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
 370          PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
 371         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
 372         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
 373         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
 374         {0, NULL}
 375 };
 376
 377 int db_export__branch_types(struct db_export *dbe)
 378 {
 379         int i, err = 0;
 380
 381         for (i = 0; branch_types[i].name ; i++) {
 382                 err = db_export__branch_type(dbe, branch_types[i].branch_type,
 383                                              branch_types[i].name);
 384                 if (err)
 385                         break;
 386         }
 387         return err;
 388 }
 389
 390 int db_export__call_path(struct db_export *dbe, struct call_path *cp)
 391 {
 392         int err;
 393
 394         if (cp->db_id)
 395                 return 0;
 396
 397         if (cp->parent) {
 398                 err = db_export__call_path(dbe, cp->parent);
 399                 if (err)
 400                         return err;
 401         }
 402
 403         cp->db_id = ++dbe->call_path_last_db_id;
 404
 405         if (dbe->export_call_path)
 406                 return dbe->export_call_path(dbe, cp);
 407
 408         return 0;
 409 }
 410
 411 int db_export__call_return(struct db_export *dbe, struct call_return *cr)
 412 {
 413         int err;
 414
 415         if (cr->db_id)
 416                 return 0;
 417
 418         err = db_export__call_path(dbe, cr->cp);
 419         if (err)
 420                 return err;
 421
 422         cr->db_id = ++dbe->call_return_last_db_id;
 423
 424         if (dbe->export_call_return)
 425                 return dbe->export_call_return(dbe, cr);
 426
 427         return 0;
 428 }