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 "callchain.h"
  27 #include "call-path.h"
  28 #include "db-export.h"
  29
  30 struct deferred_export {
  31         struct list_head node;
  32         struct comm *comm;
  33 };
  34
  35 static int db_export__deferred(struct db_export *dbe)
  36 {
  37         struct deferred_export *de;
  38         int err;
  39
  40         while (!list_empty(&dbe->deferred)) {
  41                 de = list_entry(dbe->deferred.next, struct deferred_export,
  42                                 node);
  43                 err = dbe->export_comm(dbe, de->comm);
  44                 list_del(&de->node);
  45                 free(de);
  46                 if (err)
  47                         return err;
  48         }
  49
  50         return 0;
  51 }
  52
  53 static void db_export__free_deferred(struct db_export *dbe)
  54 {
  55         struct deferred_export *de;
  56
  57         while (!list_empty(&dbe->deferred)) {
  58                 de = list_entry(dbe->deferred.next, struct deferred_export,
  59                                 node);
  60                 list_del(&de->node);
  61                 free(de);
  62         }
  63 }
  64
  65 static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
  66 {
  67         struct deferred_export *de;
  68
  69         de = zalloc(sizeof(struct deferred_export));
  70         if (!de)
  71                 return -ENOMEM;
  72
  73         de->comm = comm;
  74         list_add_tail(&de->node, &dbe->deferred);
  75
  76         return 0;
  77 }
  78
  79 int db_export__init(struct db_export *dbe)
  80 {
  81         memset(dbe, 0, sizeof(struct db_export));
  82         INIT_LIST_HEAD(&dbe->deferred);
  83         return 0;
  84 }
  85
  86 int db_export__flush(struct db_export *dbe)
  87 {
  88         return db_export__deferred(dbe);
  89 }
  90
  91 void db_export__exit(struct db_export *dbe)
  92 {
  93         db_export__free_deferred(dbe);
  94         call_return_processor__free(dbe->crp);
  95         dbe->crp = NULL;
  96 }
  97
  98 int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
  99 {
 100         if (evsel->db_id)
 101                 return 0;
 102
 103         evsel->db_id = ++dbe->evsel_last_db_id;
 104
 105         if (dbe->export_evsel)
 106                 return dbe->export_evsel(dbe, evsel);
 107
 108         return 0;
 109 }
 110
 111 int db_export__machine(struct db_export *dbe, struct machine *machine)
 112 {
 113         if (machine->db_id)
 114                 return 0;
 115
 116         machine->db_id = ++dbe->machine_last_db_id;
 117
 118         if (dbe->export_machine)
 119                 return dbe->export_machine(dbe, machine);
 120
 121         return 0;
 122 }
 123
 124 int db_export__thread(struct db_export *dbe, struct thread *thread,
 125                       struct machine *machine, struct comm *comm)
 126 {
 127         struct thread *main_thread;
 128         u64 main_thread_db_id = 0;
 129         int err;
 130
 131         if (thread->db_id)
 132                 return 0;
 133
 134         thread->db_id = ++dbe->thread_last_db_id;
 135
 136         if (thread->pid_ != -1) {
 137                 if (thread->pid_ == thread->tid) {
 138                         main_thread = thread;
 139                 } else {
 140                         main_thread = machine__findnew_thread(machine,
 141                                                               thread->pid_,
 142                                                               thread->pid_);
 143                         if (!main_thread)
 144                                 return -ENOMEM;
 145                         err = db_export__thread(dbe, main_thread, machine,
 146                                                 comm);
 147                         if (err)
 148                                 goto out_put;
 149                         if (comm) {
 150                                 err = db_export__comm_thread(dbe, comm, thread);
 151                                 if (err)
 152                                         goto out_put;
 153                         }
 154                 }
 155                 main_thread_db_id = main_thread->db_id;
 156                 if (main_thread != thread)
 157                         thread__put(main_thread);
 158         }
 159
 160         if (dbe->export_thread)
 161                 return dbe->export_thread(dbe, thread, main_thread_db_id,
 162                                           machine);
 163
 164         return 0;
 165
 166 out_put:
 167         thread__put(main_thread);
 168         return err;
 169 }
 170
 171 int db_export__comm(struct db_export *dbe, struct comm *comm,
 172                     struct thread *main_thread)
 173 {
 174         int err;
 175
 176         if (comm->db_id)
 177                 return 0;
 178
 179         comm->db_id = ++dbe->comm_last_db_id;
 180
 181         if (dbe->export_comm) {
 182                 if (main_thread->comm_set)
 183                         err = dbe->export_comm(dbe, comm);
 184                 else
 185                         err = db_export__defer_comm(dbe, comm);
 186                 if (err)
 187                         return err;
 188         }
 189
 190         return db_export__comm_thread(dbe, comm, main_thread);
 191 }
 192
 193 int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
 194                            struct thread *thread)
 195 {
 196         u64 db_id;
 197
 198         db_id = ++dbe->comm_thread_last_db_id;
 199
 200         if (dbe->export_comm_thread)
 201                 return dbe->export_comm_thread(dbe, db_id, comm, thread);
 202
 203         return 0;
 204 }
 205
 206 int db_export__dso(struct db_export *dbe, struct dso *dso,
 207                    struct machine *machine)
 208 {
 209         if (dso->db_id)
 210                 return 0;
 211
 212         dso->db_id = ++dbe->dso_last_db_id;
 213
 214         if (dbe->export_dso)
 215                 return dbe->export_dso(dbe, dso, machine);
 216
 217         return 0;
 218 }
 219
 220 int db_export__symbol(struct db_export *dbe, struct symbol *sym,
 221                       struct dso *dso)
 222 {
 223         u64 *sym_db_id = symbol__priv(sym);
 224
 225         if (*sym_db_id)
 226                 return 0;
 227
 228         *sym_db_id = ++dbe->symbol_last_db_id;
 229
 230         if (dbe->export_symbol)
 231                 return dbe->export_symbol(dbe, sym, dso);
 232
 233         return 0;
 234 }
 235
 236 static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
 237                           u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
 238 {
 239         int err;
 240
 241         if (al->map) {
 242                 struct dso *dso = al->map->dso;
 243
 244                 err = db_export__dso(dbe, dso, al->machine);
 245                 if (err)
 246                         return err;
 247                 *dso_db_id = dso->db_id;
 248
 249                 if (!al->sym) {
 250                         al->sym = symbol__new(al->addr, 0, 0, 0, "unknown");
 251                         if (al->sym)
 252                                 dso__insert_symbol(dso, al->sym);
 253                 }
 254
 255                 if (al->sym) {
 256                         u64 *db_id = symbol__priv(al->sym);
 257
 258                         err = db_export__symbol(dbe, al->sym, dso);
 259                         if (err)
 260                                 return err;
 261                         *sym_db_id = *db_id;
 262                         *offset = al->addr - al->sym->start;
 263                 }
 264         }
 265
 266         return 0;
 267 }
 268
 269 static struct call_path *call_path_from_sample(struct db_export *dbe,
 270                                                struct machine *machine,
 271                                                struct thread *thread,
 272                                                struct perf_sample *sample,
 273                                                struct perf_evsel *evsel)
 274 {
 275         u64 kernel_start = machine__kernel_start(machine);
 276         struct call_path *current = &dbe->cpr->call_path;
 277         enum chain_order saved_order = callchain_param.order;
 278         int err;
 279
 280         if (!symbol_conf.use_callchain || !sample->callchain)
 281                 return NULL;
 282
 283         /*
 284          * Since the call path tree must be built starting with the root, we
 285          * must use ORDER_CALL for call chain resolution, in order to process
 286          * the callchain starting with the root node and ending with the leaf.
 287          */
 288         callchain_param.order = ORDER_CALLER;
 289         err = thread__resolve_callchain(thread, &callchain_cursor, evsel,
 290                                         sample, NULL, NULL, PERF_MAX_STACK_DEPTH);
 291         if (err) {
 292                 callchain_param.order = saved_order;
 293                 return NULL;
 294         }
 295         callchain_cursor_commit(&callchain_cursor);
 296
 297         while (1) {
 298                 struct callchain_cursor_node *node;
 299                 struct addr_location al;
 300                 u64 dso_db_id = 0, sym_db_id = 0, offset = 0;
 301
 302                 memset(&al, 0, sizeof(al));
 303
 304                 node = callchain_cursor_current(&callchain_cursor);
 305                 if (!node)
 306                         break;
 307                 /*
 308                  * Handle export of symbol and dso for this node by
 309                  * constructing an addr_location struct and then passing it to
 310                  * db_ids_from_al() to perform the export.
 311                  */
 312                 al.sym = node->sym;
 313                 al.map = node->map;
 314                 al.machine = machine;
 315                 al.addr = node->ip;
 316
 317                 if (al.map && !al.sym)
 318                         al.sym = dso__find_symbol(al.map->dso, al.addr);
 319
 320                 db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);
 321
 322                 /* add node to the call path tree if it doesn't exist */
 323                 current = call_path__findnew(dbe->cpr, current,
 324                                              al.sym, node->ip,
 325                                              kernel_start);
 326
 327                 callchain_cursor_advance(&callchain_cursor);
 328         }
 329
 330         /* Reset the callchain order to its prior value. */
 331         callchain_param.order = saved_order;
 332
 333         if (current == &dbe->cpr->call_path) {
 334                 /* Bail because the callchain was empty. */
 335                 return NULL;
 336         }
 337
 338         return current;
 339 }
 340
 341 int db_export__branch_type(struct db_export *dbe, u32 branch_type,
 342                            const char *name)
 343 {
 344         if (dbe->export_branch_type)
 345                 return dbe->export_branch_type(dbe, branch_type, name);
 346
 347         return 0;
 348 }
 349
 350 int db_export__sample(struct db_export *dbe, union perf_event *event,
 351                       struct perf_sample *sample, struct perf_evsel *evsel,
 352                       struct addr_location *al)
 353 {
 354         struct thread* thread = al->thread;
 355         struct export_sample es = {
 356                 .event = event,
 357                 .sample = sample,
 358                 .evsel = evsel,
 359                 .al = al,
 360         };
 361         struct thread *main_thread;
 362         struct comm *comm = NULL;
 363         int err;
 364
 365         err = db_export__evsel(dbe, evsel);
 366         if (err)
 367                 return err;
 368
 369         err = db_export__machine(dbe, al->machine);
 370         if (err)
 371                 return err;
 372
 373         main_thread = thread__main_thread(al->machine, thread);
 374         if (main_thread)
 375                 comm = machine__thread_exec_comm(al->machine, main_thread);
 376
 377         err = db_export__thread(dbe, thread, al->machine, comm);
 378         if (err)
 379                 goto out_put;
 380
 381         if (comm) {
 382                 err = db_export__comm(dbe, comm, main_thread);
 383                 if (err)
 384                         goto out_put;
 385                 es.comm_db_id = comm->db_id;
 386         }
 387
 388         es.db_id = ++dbe->sample_last_db_id;
 389
 390         err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
 391         if (err)
 392                 goto out_put;
 393
 394         if (dbe->cpr) {
 395                 struct call_path *cp = call_path_from_sample(dbe, al->machine,
 396                                                              thread, sample,
 397                                                              evsel);
 398                 if (cp) {
 399                         db_export__call_path(dbe, cp);
 400                         es.call_path_id = cp->db_id;
 401                 }
 402         }
 403
 404         if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
 405             sample_addr_correlates_sym(&evsel->attr)) {
 406                 struct addr_location addr_al;
 407
 408                 thread__resolve(thread, &addr_al, sample);
 409                 err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
 410                                      &es.addr_sym_db_id, &es.addr_offset);
 411                 if (err)
 412                         goto out_put;
 413                 if (dbe->crp) {
 414                         err = thread_stack__process(thread, comm, sample, al,
 415                                                     &addr_al, es.db_id,
 416                                                     dbe->crp);
 417                         if (err)
 418                                 goto out_put;
 419                 }
 420         }
 421
 422         if (dbe->export_sample)
 423                 err = dbe->export_sample(dbe, &es);
 424
 425 out_put:
 426         thread__put(main_thread);
 427         return err;
 428 }
 429
 430 static struct {
 431         u32 branch_type;
 432         const char *name;
 433 } branch_types[] = {
 434         {0, "no branch"},
 435         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
 436         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
 437         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
 438         {PERF_IP_FLAG_BRANCH, "unconditional jump"},
 439         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
 440          "software interrupt"},
 441         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
 442          "return from interrupt"},
 443         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
 444          "system call"},
 445         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
 446          "return from system call"},
 447         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
 448         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
 449          PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
 450         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
 451         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
 452         {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
 453         {0, NULL}
 454 };
 455
 456 int db_export__branch_types(struct db_export *dbe)
 457 {
 458         int i, err = 0;
 459
 460         for (i = 0; branch_types[i].name ; i++) {
 461                 err = db_export__branch_type(dbe, branch_types[i].branch_type,
 462                                              branch_types[i].name);
 463                 if (err)
 464                         break;
 465         }
 466         return err;
 467 }
 468
 469 int db_export__call_path(struct db_export *dbe, struct call_path *cp)
 470 {
 471         int err;
 472
 473         if (cp->db_id)
 474                 return 0;
 475
 476         if (cp->parent) {
 477                 err = db_export__call_path(dbe, cp->parent);
 478                 if (err)
 479                         return err;
 480         }
 481
 482         cp->db_id = ++dbe->call_path_last_db_id;
 483
 484         if (dbe->export_call_path)
 485                 return dbe->export_call_path(dbe, cp);
 486
 487         return 0;
 488 }
 489
 490 int db_export__call_return(struct db_export *dbe, struct call_return *cr)
 491 {
 492         int err;
 493
 494         if (cr->db_id)
 495                 return 0;
 496
 497         err = db_export__call_path(dbe, cr->cp);
 498         if (err)
 499                 return err;
 500
 501         cr->db_id = ++dbe->call_return_last_db_id;
 502
 503         if (dbe->export_call_return)
 504                 return dbe->export_call_return(dbe, cr);
 505
 506         return 0;
 507 }