tools/perf/builtin-annotate.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * builtin-annotate.c
   4  *
   5  * Builtin annotate command: Analyze the perf.data input file,
   6  * look up and read DSOs and symbol information and display
   7  * a histogram of results, along various sorting keys.
   8  */
   9 #include "builtin.h"
  10
  11 #include "util/color.h"
  12 #include <linux/list.h>
  13 #include "util/cache.h"
  14 #include <linux/rbtree.h>
  15 #include <linux/zalloc.h>
  16 #include "util/symbol.h"
  17
  18 #include "util/debug.h"
  19
  20 #include "util/evlist.h"
  21 #include "util/evsel.h"
  22 #include "util/annotate.h"
  23 #include "util/event.h"
  24 #include <subcmd/parse-options.h>
  25 #include "util/parse-events.h"
  26 #include "util/sort.h"
  27 #include "util/hist.h"
  28 #include "util/dso.h"
  29 #include "util/machine.h"
  30 #include "util/map.h"
  31 #include "util/session.h"
  32 #include "util/tool.h"
  33 #include "util/data.h"
  34 #include "arch/common.h"
  35 #include "util/block-range.h"
  36 #include "util/map_symbol.h"
  37 #include "util/branch.h"
  38 #include "util/util.h"
  39
  40 #include <dlfcn.h>
  41 #include <errno.h>
  42 #include <linux/bitmap.h>
  43 #include <linux/err.h>
  44
  45 struct perf_annotate {
  46         struct perf_tool tool;
  47         struct perf_session *session;
  48         struct annotation_options opts;
  49 #ifdef HAVE_SLANG_SUPPORT
  50         bool       use_tui;
  51 #endif
  52         bool       use_stdio, use_stdio2;
  53 #ifdef HAVE_GTK2_SUPPORT
  54         bool       use_gtk;
  55 #endif
  56         bool       skip_missing;
  57         bool       has_br_stack;
  58         bool       group_set;
  59         float      min_percent;
  60         const char *sym_hist_filter;
  61         const char *cpu_list;
  62         DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
  63 };
  64
  65 /*
  66  * Given one basic block:
  67  *
  68  *      from    to              branch_i
  69  *      * ----> *
  70  *              |
  71  *              | block
  72  *              v
  73  *              * ----> *
  74  *              from    to      branch_i+1
  75  *
  76  * where the horizontal are the branches and the vertical is the executed
  77  * block of instructions.
  78  *
  79  * We count, for each 'instruction', the number of blocks that covered it as
  80  * well as count the ratio each branch is taken.
  81  *
  82  * We can do this without knowing the actual instruction stream by keeping
  83  * track of the address ranges. We break down ranges such that there is no
  84  * overlap and iterate from the start until the end.
  85  *
  86  * @acme: once we parse the objdump output _before_ processing the samples,
  87  * we can easily fold the branch.cycles IPC bits in.
  88  */
  89 static void process_basic_block(struct addr_map_symbol *start,
  90                                 struct addr_map_symbol *end,
  91                                 struct branch_flags *flags)
  92 {
  93         struct symbol *sym = start->ms.sym;
  94         struct annotation *notes = sym ? symbol__annotation(sym) : NULL;
  95         struct block_range_iter iter;
  96         struct block_range *entry;
  97
  98         /*
  99          * Sanity; NULL isn't executable and the CPU cannot execute backwards
 100          */
 101         if (!start->addr || start->addr > end->addr)
 102                 return;
 103
 104         iter = block_range__create(start->addr, end->addr);
 105         if (!block_range_iter__valid(&iter))
 106                 return;
 107
 108         /*
 109          * First block in range is a branch target.
 110          */
 111         entry = block_range_iter(&iter);
 112         assert(entry->is_target);
 113         entry->entry++;
 114
 115         do {
 116                 entry = block_range_iter(&iter);
 117
 118                 entry->coverage++;
 119                 entry->sym = sym;
 120
 121                 if (notes)
 122                         notes->max_coverage = max(notes->max_coverage, entry->coverage);
 123
 124         } while (block_range_iter__next(&iter));
 125
 126         /*
 127          * Last block in rage is a branch.
 128          */
 129         entry = block_range_iter(&iter);
 130         assert(entry->is_branch);
 131         entry->taken++;
 132         if (flags->predicted)
 133                 entry->pred++;
 134 }
 135
 136 static void process_branch_stack(struct branch_stack *bs, struct addr_location *al,
 137                                  struct perf_sample *sample)
 138 {
 139         struct addr_map_symbol *prev = NULL;
 140         struct branch_info *bi;
 141         int i;
 142
 143         if (!bs || !bs->nr)
 144                 return;
 145
 146         bi = sample__resolve_bstack(sample, al);
 147         if (!bi)
 148                 return;
 149
 150         for (i = bs->nr - 1; i >= 0; i--) {
 151                 /*
 152                  * XXX filter against symbol
 153                  */
 154                 if (prev)
 155                         process_basic_block(prev, &bi[i].from, &bi[i].flags);
 156                 prev = &bi[i].to;
 157         }
 158
 159         free(bi);
 160 }
 161
 162 static int hist_iter__branch_callback(struct hist_entry_iter *iter,
 163                                       struct addr_location *al __maybe_unused,
 164                                       bool single __maybe_unused,
 165                                       void *arg __maybe_unused)
 166 {
 167         struct hist_entry *he = iter->he;
 168         struct branch_info *bi;
 169         struct perf_sample *sample = iter->sample;
 170         struct evsel *evsel = iter->evsel;
 171         int err;
 172
 173         bi = he->branch_info;
 174         err = addr_map_symbol__inc_samples(&bi->from, sample, evsel);
 175
 176         if (err)
 177                 goto out;
 178
 179         err = addr_map_symbol__inc_samples(&bi->to, sample, evsel);
 180
 181 out:
 182         return err;
 183 }
 184
 185 static int process_branch_callback(struct evsel *evsel,
 186                                    struct perf_sample *sample,
 187                                    struct addr_location *al __maybe_unused,
 188                                    struct perf_annotate *ann,
 189                                    struct machine *machine)
 190 {
 191         struct hist_entry_iter iter = {
 192                 .evsel          = evsel,
 193                 .sample         = sample,
 194                 .add_entry_cb   = hist_iter__branch_callback,
 195                 .hide_unresolved        = symbol_conf.hide_unresolved,
 196                 .ops            = &hist_iter_branch,
 197         };
 198
 199         struct addr_location a;
 200
 201         if (machine__resolve(machine, &a, sample) < 0)
 202                 return -1;
 203
 204         if (a.sym == NULL)
 205                 return 0;
 206
 207         if (a.map != NULL)
 208                 map__dso(a.map)->hit = 1;
 209
 210         hist__account_cycles(sample->branch_stack, al, sample, false, NULL);
 211
 212         return hist_entry_iter__add(&iter, &a, PERF_MAX_STACK_DEPTH, ann);
 213 }
 214
 215 static bool has_annotation(struct perf_annotate *ann)
 216 {
 217         return ui__has_annotation() || ann->use_stdio2;
 218 }
 219
 220 static int evsel__add_sample(struct evsel *evsel, struct perf_sample *sample,
 221                              struct addr_location *al, struct perf_annotate *ann,
 222                              struct machine *machine)
 223 {
 224         struct hists *hists = evsel__hists(evsel);
 225         struct hist_entry *he;
 226         int ret;
 227
 228         if ((!ann->has_br_stack || !has_annotation(ann)) &&
 229             ann->sym_hist_filter != NULL &&
 230             (al->sym == NULL ||
 231              strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
 232                 /* We're only interested in a symbol named sym_hist_filter */
 233                 /*
 234                  * FIXME: why isn't this done in the symbol_filter when loading
 235                  * the DSO?
 236                  */
 237                 if (al->sym != NULL) {
 238                         struct dso *dso = map__dso(al->map);
 239
 240                         rb_erase_cached(&al->sym->rb_node, &dso->symbols);
 241                         symbol__delete(al->sym);
 242                         dso__reset_find_symbol_cache(dso);
 243                 }
 244                 return 0;
 245         }
 246
 247         /*
 248          * XXX filtered samples can still have branch entries pointing into our
 249          * symbol and are missed.
 250          */
 251         process_branch_stack(sample->branch_stack, al, sample);
 252
 253         if (ann->has_br_stack && has_annotation(ann))
 254                 return process_branch_callback(evsel, sample, al, ann, machine);
 255
 256         he = hists__add_entry(hists, al, NULL, NULL, NULL, NULL, sample, true);
 257         if (he == NULL)
 258                 return -ENOMEM;
 259
 260         ret = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
 261         hists__inc_nr_samples(hists, true);
 262         return ret;
 263 }
 264
 265 static int process_sample_event(struct perf_tool *tool,
 266                                 union perf_event *event,
 267                                 struct perf_sample *sample,
 268                                 struct evsel *evsel,
 269                                 struct machine *machine)
 270 {
 271         struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
 272         struct addr_location al;
 273         int ret = 0;
 274
 275         if (machine__resolve(machine, &al, sample) < 0) {
 276                 pr_warning("problem processing %d event, skipping it.\n",
 277                            event->header.type);
 278                 return -1;
 279         }
 280
 281         if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
 282                 goto out_put;
 283
 284         if (!al.filtered &&
 285             evsel__add_sample(evsel, sample, &al, ann, machine)) {
 286                 pr_warning("problem incrementing symbol count, "
 287                            "skipping event\n");
 288                 ret = -1;
 289         }
 290 out_put:
 291         addr_location__put(&al);
 292         return ret;
 293 }
 294
 295 static int process_feature_event(struct perf_session *session,
 296                                  union perf_event *event)
 297 {
 298         if (event->feat.feat_id < HEADER_LAST_FEATURE)
 299                 return perf_event__process_feature(session, event);
 300         return 0;
 301 }
 302
 303 static int hist_entry__tty_annotate(struct hist_entry *he,
 304                                     struct evsel *evsel,
 305                                     struct perf_annotate *ann)
 306 {
 307         if (!ann->use_stdio2)
 308                 return symbol__tty_annotate(&he->ms, evsel, &ann->opts);
 309
 310         return symbol__tty_annotate2(&he->ms, evsel, &ann->opts);
 311 }
 312
 313 static void hists__find_annotations(struct hists *hists,
 314                                     struct evsel *evsel,
 315                                     struct perf_annotate *ann)
 316 {
 317         struct rb_node *nd = rb_first_cached(&hists->entries), *next;
 318         int key = K_RIGHT;
 319
 320         while (nd) {
 321                 struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
 322                 struct annotation *notes;
 323
 324                 if (he->ms.sym == NULL || map__dso(he->ms.map)->annotate_warned)
 325                         goto find_next;
 326
 327                 if (ann->sym_hist_filter &&
 328                     (strcmp(he->ms.sym->name, ann->sym_hist_filter) != 0))
 329                         goto find_next;
 330
 331                 if (ann->min_percent) {
 332                         float percent = 0;
 333                         u64 total = hists__total_period(hists);
 334
 335                         if (total)
 336                                 percent = 100.0 * he->stat.period / total;
 337
 338                         if (percent < ann->min_percent)
 339                                 goto find_next;
 340                 }
 341
 342                 notes = symbol__annotation(he->ms.sym);
 343                 if (notes->src == NULL) {
 344 find_next:
 345                         if (key == K_LEFT)
 346                                 nd = rb_prev(nd);
 347                         else
 348                                 nd = rb_next(nd);
 349                         continue;
 350                 }
 351
 352                 if (use_browser == 2) {
 353                         int ret;
 354                         int (*annotate)(struct hist_entry *he,
 355                                         struct evsel *evsel,
 356                                         struct annotation_options *options,
 357                                         struct hist_browser_timer *hbt);
 358
 359                         annotate = dlsym(perf_gtk_handle,
 360                                          "hist_entry__gtk_annotate");
 361                         if (annotate == NULL) {
 362                                 ui__error("GTK browser not found!\n");
 363                                 return;
 364                         }
 365
 366                         ret = annotate(he, evsel, &ann->opts, NULL);
 367                         if (!ret || !ann->skip_missing)
 368                                 return;
 369
 370                         /* skip missing symbols */
 371                         nd = rb_next(nd);
 372                 } else if (use_browser == 1) {
 373                         key = hist_entry__tui_annotate(he, evsel, NULL, &ann->opts);
 374
 375                         switch (key) {
 376                         case -1:
 377                                 if (!ann->skip_missing)
 378                                         return;
 379                                 /* fall through */
 380                         case K_RIGHT:
 381                                 next = rb_next(nd);
 382                                 break;
 383                         case K_LEFT:
 384                                 next = rb_prev(nd);
 385                                 break;
 386                         default:
 387                                 return;
 388                         }
 389
 390                         if (next != NULL)
 391                                 nd = next;
 392                 } else {
 393                         hist_entry__tty_annotate(he, evsel, ann);
 394                         nd = rb_next(nd);
 395                 }
 396         }
 397 }
 398
 399 static int __cmd_annotate(struct perf_annotate *ann)
 400 {
 401         int ret;
 402         struct perf_session *session = ann->session;
 403         struct evsel *pos;
 404         u64 total_nr_samples;
 405
 406         if (ann->cpu_list) {
 407                 ret = perf_session__cpu_bitmap(session, ann->cpu_list,
 408                                                ann->cpu_bitmap);
 409                 if (ret)
 410                         goto out;
 411         }
 412
 413         if (!ann->opts.objdump_path) {
 414                 ret = perf_env__lookup_objdump(&session->header.env,
 415                                                &ann->opts.objdump_path);
 416                 if (ret)
 417                         goto out;
 418         }
 419
 420         ret = perf_session__process_events(session);
 421         if (ret)
 422                 goto out;
 423
 424         if (dump_trace) {
 425                 perf_session__fprintf_nr_events(session, stdout, false);
 426                 evlist__fprintf_nr_events(session->evlist, stdout, false);
 427                 goto out;
 428         }
 429
 430         if (verbose > 3)
 431                 perf_session__fprintf(session, stdout);
 432
 433         if (verbose > 2)
 434                 perf_session__fprintf_dsos(session, stdout);
 435
 436         total_nr_samples = 0;
 437         evlist__for_each_entry(session->evlist, pos) {
 438                 struct hists *hists = evsel__hists(pos);
 439                 u32 nr_samples = hists->stats.nr_samples;
 440
 441                 if (nr_samples > 0) {
 442                         total_nr_samples += nr_samples;
 443                         hists__collapse_resort(hists, NULL);
 444                         /* Don't sort callchain */
 445                         evsel__reset_sample_bit(pos, CALLCHAIN);
 446                         evsel__output_resort(pos, NULL);
 447
 448                         if (symbol_conf.event_group && !evsel__is_group_leader(pos))
 449                                 continue;
 450
 451                         hists__find_annotations(hists, pos, ann);
 452                 }
 453         }
 454
 455         if (total_nr_samples == 0) {
 456                 ui__error("The %s data has no samples!\n", session->data->path);
 457                 goto out;
 458         }
 459
 460         if (use_browser == 2) {
 461                 void (*show_annotations)(void);
 462
 463                 show_annotations = dlsym(perf_gtk_handle,
 464                                          "perf_gtk__show_annotations");
 465                 if (show_annotations == NULL) {
 466                         ui__error("GTK browser not found!\n");
 467                         goto out;
 468                 }
 469                 show_annotations();
 470         }
 471
 472 out:
 473         return ret;
 474 }
 475
 476 static int parse_percent_limit(const struct option *opt, const char *str,
 477                                int unset __maybe_unused)
 478 {
 479         struct perf_annotate *ann = opt->value;
 480         double pcnt = strtof(str, NULL);
 481
 482         ann->min_percent = pcnt;
 483         return 0;
 484 }
 485
 486 static const char * const annotate_usage[] = {
 487         "perf annotate [<options>]",
 488         NULL
 489 };
 490
 491 int cmd_annotate(int argc, const char **argv)
 492 {
 493         struct perf_annotate annotate = {
 494                 .tool = {
 495                         .sample = process_sample_event,
 496                         .mmap   = perf_event__process_mmap,
 497                         .mmap2  = perf_event__process_mmap2,
 498                         .comm   = perf_event__process_comm,
 499                         .exit   = perf_event__process_exit,
 500                         .fork   = perf_event__process_fork,
 501                         .namespaces = perf_event__process_namespaces,
 502                         .attr   = perf_event__process_attr,
 503                         .build_id = perf_event__process_build_id,
 504 #ifdef HAVE_LIBTRACEEVENT
 505                         .tracing_data   = perf_event__process_tracing_data,
 506 #endif
 507                         .id_index       = perf_event__process_id_index,
 508                         .auxtrace_info  = perf_event__process_auxtrace_info,
 509                         .auxtrace       = perf_event__process_auxtrace,
 510                         .feature        = process_feature_event,
 511                         .ordered_events = true,
 512                         .ordering_requires_timestamps = true,
 513                 },
 514         };
 515         struct perf_data data = {
 516                 .mode  = PERF_DATA_MODE_READ,
 517         };
 518         struct itrace_synth_opts itrace_synth_opts = {
 519                 .set = 0,
 520         };
 521         const char *disassembler_style = NULL, *objdump_path = NULL, *addr2line_path = NULL;
 522         struct option options[] = {
 523         OPT_STRING('i', "input", &input_name, "file",
 524                     "input file name"),
 525         OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
 526                    "only consider symbols in these dsos"),
 527         OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
 528                     "symbol to annotate"),
 529         OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
 530         OPT_INCR('v', "verbose", &verbose,
 531                     "be more verbose (show symbol address, etc)"),
 532         OPT_BOOLEAN('q', "quiet", &quiet, "do now show any warnings or messages"),
 533         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 534                     "dump raw trace in ASCII"),
 535 #ifdef HAVE_GTK2_SUPPORT
 536         OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
 537 #endif
 538 #ifdef HAVE_SLANG_SUPPORT
 539         OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
 540 #endif
 541         OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
 542         OPT_BOOLEAN(0, "stdio2", &annotate.use_stdio2, "Use the stdio interface"),
 543         OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
 544                     "don't load vmlinux even if found"),
 545         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
 546                    "file", "vmlinux pathname"),
 547         OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
 548                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
 549         OPT_BOOLEAN('l', "print-line", &annotate.opts.print_lines,
 550                     "print matching source lines (may be slow)"),
 551         OPT_BOOLEAN('P', "full-paths", &annotate.opts.full_path,
 552                     "Don't shorten the displayed pathnames"),
 553         OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
 554                     "Skip symbols that cannot be annotated"),
 555         OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group,
 556                         &annotate.group_set,
 557                         "Show event group information together"),
 558         OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
 559         OPT_CALLBACK(0, "symfs", NULL, "directory",
 560                      "Look for files with symbols relative to this directory",
 561                      symbol__config_symfs),
 562         OPT_BOOLEAN(0, "source", &annotate.opts.annotate_src,
 563                     "Interleave source code with assembly code (default)"),
 564         OPT_BOOLEAN(0, "asm-raw", &annotate.opts.show_asm_raw,
 565                     "Display raw encoding of assembly instructions (default)"),
 566         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
 567                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
 568         OPT_STRING(0, "prefix", &annotate.opts.prefix, "prefix",
 569                     "Add prefix to source file path names in programs (with --prefix-strip)"),
 570         OPT_STRING(0, "prefix-strip", &annotate.opts.prefix_strip, "N",
 571                     "Strip first N entries of source file path name in programs (with --prefix)"),
 572         OPT_STRING(0, "objdump", &objdump_path, "path",
 573                    "objdump binary to use for disassembly and annotations"),
 574         OPT_STRING(0, "addr2line", &addr2line_path, "path",
 575                    "addr2line binary to use for line numbers"),
 576         OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
 577                     "Enable symbol demangling"),
 578         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
 579                     "Enable kernel symbol demangling"),
 580         OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
 581                     "Show event group information together"),
 582         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
 583                     "Show a column with the sum of periods"),
 584         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
 585                     "Show a column with the number of samples"),
 586         OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
 587                              "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
 588                              stdio__config_color, "always"),
 589         OPT_CALLBACK(0, "percent-type", &annotate.opts, "local-period",
 590                      "Set percent type local/global-period/hits",
 591                      annotate_parse_percent_type),
 592         OPT_CALLBACK(0, "percent-limit", &annotate, "percent",
 593                      "Don't show entries under that percent", parse_percent_limit),
 594         OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
 595                             "Instruction Tracing options\n" ITRACE_HELP,
 596                             itrace_parse_synth_opts),
 597
 598         OPT_END()
 599         };
 600         int ret;
 601
 602         set_option_flag(options, 0, "show-total-period", PARSE_OPT_EXCLUSIVE);
 603         set_option_flag(options, 0, "show-nr-samples", PARSE_OPT_EXCLUSIVE);
 604
 605         annotation_options__init(&annotate.opts);
 606
 607         ret = hists__init();
 608         if (ret < 0)
 609                 return ret;
 610
 611         annotation_config__init(&annotate.opts);
 612
 613         argc = parse_options(argc, argv, options, annotate_usage, 0);
 614         if (argc) {
 615                 /*
 616                  * Special case: if there's an argument left then assume that
 617                  * it's a symbol filter:
 618                  */
 619                 if (argc > 1)
 620                         usage_with_options(annotate_usage, options);
 621
 622                 annotate.sym_hist_filter = argv[0];
 623         }
 624
 625         if (disassembler_style) {
 626                 annotate.opts.disassembler_style = strdup(disassembler_style);
 627                 if (!annotate.opts.disassembler_style)
 628                         return -ENOMEM;
 629         }
 630         if (objdump_path) {
 631                 annotate.opts.objdump_path = strdup(objdump_path);
 632                 if (!annotate.opts.objdump_path)
 633                         return -ENOMEM;
 634         }
 635         if (addr2line_path) {
 636                 symbol_conf.addr2line_path = strdup(addr2line_path);
 637                 if (!symbol_conf.addr2line_path)
 638                         return -ENOMEM;
 639         }
 640
 641         if (annotate_check_args(&annotate.opts) < 0)
 642                 return -EINVAL;
 643
 644 #ifdef HAVE_GTK2_SUPPORT
 645         if (symbol_conf.show_nr_samples && annotate.use_gtk) {
 646                 pr_err("--show-nr-samples is not available in --gtk mode at this time\n");
 647                 return ret;
 648         }
 649 #endif
 650
 651         ret = symbol__validate_sym_arguments();
 652         if (ret)
 653                 return ret;
 654
 655         if (quiet)
 656                 perf_quiet_option();
 657
 658         data.path = input_name;
 659
 660         annotate.session = perf_session__new(&data, &annotate.tool);
 661         if (IS_ERR(annotate.session))
 662                 return PTR_ERR(annotate.session);
 663
 664         annotate.session->itrace_synth_opts = &itrace_synth_opts;
 665
 666         annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
 667                                                       HEADER_BRANCH_STACK);
 668
 669         if (annotate.group_set)
 670                 evlist__force_leader(annotate.session->evlist);
 671
 672         ret = symbol__annotation_init();
 673         if (ret < 0)
 674                 goto out_delete;
 675
 676         symbol_conf.try_vmlinux_path = true;
 677
 678         ret = symbol__init(&annotate.session->header.env);
 679         if (ret < 0)
 680                 goto out_delete;
 681
 682         if (annotate.use_stdio || annotate.use_stdio2)
 683                 use_browser = 0;
 684 #ifdef HAVE_SLANG_SUPPORT
 685         else if (annotate.use_tui)
 686                 use_browser = 1;
 687 #endif
 688 #ifdef HAVE_GTK2_SUPPORT
 689         else if (annotate.use_gtk)
 690                 use_browser = 2;
 691 #endif
 692
 693         setup_browser(true);
 694
 695         /*
 696          * Events of different processes may correspond to the same
 697          * symbol, we do not care about the processes in annotate,
 698          * set sort order to avoid repeated output.
 699          */
 700         sort_order = "dso,symbol";
 701
 702         /*
 703          * Set SORT_MODE__BRANCH so that annotate display IPC/Cycle
 704          * if branch info is in perf data in TUI mode.
 705          */
 706         if ((use_browser == 1 || annotate.use_stdio2) && annotate.has_br_stack)
 707                 sort__mode = SORT_MODE__BRANCH;
 708
 709         if (setup_sorting(NULL) < 0)
 710                 usage_with_options(annotate_usage, options);
 711
 712         ret = __cmd_annotate(&annotate);
 713
 714 out_delete:
 715         /*
 716          * Speed up the exit process by only deleting for debug builds. For
 717          * large files this can save time.
 718          */
 719 #ifndef NDEBUG
 720         perf_session__delete(annotate.session);
 721 #endif
 722         annotation_options__exit(&annotate.opts);
 723
 724         return ret;
 725 }