Quelle  builtin-annotate.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * builtin-annotate.c
 *
 * Builtin annotate command: Analyze the perf.data input file,
 * look up and read DSOs and symbol information and display
 * a histogram of results, along various sorting keys.
 */
#include "builtin.h"
#include "perf.h"

#include "util/color.h"
#include <linux/list.h>
#include "util/cache.h"
#include <linux/rbtree.h>
#include <linux/zalloc.h>
#include "util/symbol.h"

#include "util/debug.h"

#include "util/evlist.h"
#include "util/evsel.h"
#include "util/annotate.h"
#include "util/annotate-data.h"
#include "util/event.h"
#include <subcmd/parse-options.h>
#include "util/parse-events.h"
#include "util/sort.h"
#include "util/hist.h"
#include "util/dso.h"
#include "util/machine.h"
#include "util/map.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/data.h"
#include "arch/common.h"
#include "util/block-range.h"
#include "util/map_symbol.h"
#include "util/branch.h"
#include "util/util.h"
#include "ui/progress.h"

#include <dlfcn.h>
#include <errno.h>
#include <linux/bitmap.h>
#include <linux/err.h>
#include <inttypes.h>

struct perf_annotate {
 struct perf_tool tool;
 struct perf_session *session;
#ifdef HAVE_SLANG_SUPPORT
 bool    use_tui;
#endif
 bool    use_stdio, use_stdio2;
#ifdef HAVE_GTK2_SUPPORT
 bool    use_gtk;
#endif
 bool    skip_missing;
 bool    has_br_stack;
 bool    group_set;
 bool    data_type;
 bool    type_stat;
 bool    insn_stat;
 float    min_percent;
 const char *sym_hist_filter;
 const char *cpu_list;
 const char *target_data_type;
 DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};

/*
 * Given one basic block:
 *
 * from to branch_i
 * * ----> *
 * |
 * | block
 * v
 * * ----> *
 * from to branch_i+1
 *
 * where the horizontal are the branches and the vertical is the executed
 * block of instructions.
 *
 * We count, for each 'instruction', the number of blocks that covered it as
 * well as count the ratio each branch is taken.
 *
 * We can do this without knowing the actual instruction stream by keeping
 * track of the address ranges. We break down ranges such that there is no
 * overlap and iterate from the start until the end.
 *
 * @acme: once we parse the objdump output _before_ processing the samples,
 * we can easily fold the branch.cycles IPC bits in.
 */
static void process_basic_block(struct addr_map_symbol *start,
    struct addr_map_symbol *end,
    struct branch_flags *flags)
{
 struct symbol *sym = start->ms.sym;
 struct annotation *notes = sym ? symbol__annotation(sym) : NULL;
 struct block_range_iter iter;
 struct block_range *entry;
 struct annotated_branch *branch;

 /*
 * Sanity; NULL isn't executable and the CPU cannot execute backwards
 */
 if (!start->addr || start->addr > end->addr)
  return;

 iter = block_range__create(start->addr, end->addr);
 if (!block_range_iter__valid(&iter))
  return;

 branch = annotation__get_branch(notes);

 /*
 * First block in range is a branch target.
 */
 entry = block_range_iter(&iter);
 assert(entry->is_target);
 entry->entry++;

 do {
  entry = block_range_iter(&iter);

  entry->coverage++;
  entry->sym = sym;

  if (branch)
   branch->max_coverage = max(branch->max_coverage, entry->coverage);

 } while (block_range_iter__next(&iter));

 /*
 * Last block in rage is a branch.
 */
 entry = block_range_iter(&iter);
 assert(entry->is_branch);
 entry->taken++;
 if (flags->predicted)
  entry->pred++;
}

static void process_branch_stack(struct branch_stack *bs, struct addr_location *al,
     struct perf_sample *sample)
{
 struct addr_map_symbol *prev = NULL;
 struct branch_info *bi;
 int i;

 if (!bs || !bs->nr)
  return;

 bi = sample__resolve_bstack(sample, al);
 if (!bi)
  return;

 for (i = bs->nr - 1; i >= 0; i--) {
  /*
 * XXX filter against symbol
 */
  if (prev)
   process_basic_block(prev, &bi[i].from, &bi[i].flags);
  prev = &bi[i].to;
 }

 free(bi);
}

static int hist_iter__branch_callback(struct hist_entry_iter *iter,
          struct addr_location *al __maybe_unused,
          bool single __maybe_unused,
          void *arg __maybe_unused)
{
 struct hist_entry *he = iter->he;
 struct branch_info *bi;
 struct perf_sample *sample = iter->sample;
 struct evsel *evsel = iter->evsel;
 int err;

 bi = he->branch_info;
 err = addr_map_symbol__inc_samples(&bi->from, sample, evsel);

 if (err)
  goto out;

 err = addr_map_symbol__inc_samples(&bi->to, sample, evsel);

out:
 return err;
}

static int process_branch_callback(struct evsel *evsel,
       struct perf_sample *sample,
       struct addr_location *al,
       struct perf_annotate *ann,
       struct machine *machine)
{
 struct hist_entry_iter iter = {
  .evsel  = evsel,
  .sample  = sample,
  .add_entry_cb = hist_iter__branch_callback,
  .hide_unresolved = symbol_conf.hide_unresolved,
  .ops  = &hist_iter_branch,
 };
 struct addr_location a;
 int ret;

 addr_location__init(&a);
 if (machine__resolve(machine, &a, sample) < 0) {
  ret = -1;
  goto out;
 }

 if (a.sym == NULL) {
  ret = 0;
  goto out;
 }

 if (a.map != NULL)
  dso__set_hit(map__dso(a.map));

 hist__account_cycles(sample->branch_stack, al, sample, false,
        NULL, evsel);

 ret = hist_entry_iter__add(&iter, &a, PERF_MAX_STACK_DEPTH, ann);
out:
 addr_location__exit(&a);
 return ret;
}

static bool has_annotation(struct perf_annotate *ann)
{
 return ui__has_annotation() || ann->use_stdio2;
}

static int evsel__add_sample(struct evsel *evsel, struct perf_sample *sample,
        struct addr_location *al, struct perf_annotate *ann,
        struct machine *machine)
{
 struct hists *hists = evsel__hists(evsel);
 struct hist_entry *he;
 int ret;

 if ((!ann->has_br_stack || !has_annotation(ann)) &&
     ann->sym_hist_filter != NULL &&
     (al->sym == NULL ||
      strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
  /* We're only interested in a symbol named sym_hist_filter */
  /*
 * FIXME: why isn't this done in the symbol_filter when loading
 * the DSO?
 */
  if (al->sym != NULL) {
   struct dso *dso = map__dso(al->map);

   rb_erase_cached(&al->sym->rb_node, dso__symbols(dso));
   symbol__delete(al->sym);
   dso__reset_find_symbol_cache(dso);
  }
  return 0;
 }

 /*
 * XXX filtered samples can still have branch entries pointing into our
 * symbol and are missed.
 */
 process_branch_stack(sample->branch_stack, al, sample);

 if (ann->has_br_stack && has_annotation(ann))
  return process_branch_callback(evsel, sample, al, ann, machine);

 he = hists__add_entry(hists, al, NULL, NULL, NULL, NULL, sample, true);
 if (he == NULL)
  return -ENOMEM;

 ret = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
 hists__inc_nr_samples(hists, true);
 return ret;
}

static int process_sample_event(const struct perf_tool *tool,
    union perf_event *event,
    struct perf_sample *sample,
    struct evsel *evsel,
    struct machine *machine)
{
 struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
 struct addr_location al;
 int ret = 0;

 addr_location__init(&al);
 if (machine__resolve(machine, &al, sample) < 0) {
  pr_warning("problem processing %d event, skipping it.\n",
      event->header.type);
  ret = -1;
  goto out_put;
 }

 if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
  goto out_put;

 if (!al.filtered &&
     evsel__add_sample(evsel, sample, &al, ann, machine)) {
  pr_warning("problem incrementing symbol count, "
      "skipping event\n");
  ret = -1;
 }
out_put:
 addr_location__exit(&al);
 return ret;
}

static int process_feature_event(struct perf_session *session,
     union perf_event *event)
{
 if (event->feat.feat_id < HEADER_LAST_FEATURE)
  return perf_event__process_feature(session, event);
 return 0;
}

static int hist_entry__stdio_annotate(struct hist_entry *he,
        struct evsel *evsel,
        struct perf_annotate *ann)
{
 if (ann->use_stdio2)
  return hist_entry__tty_annotate2(he, evsel);

 return hist_entry__tty_annotate(he, evsel);
}

static void print_annotate_data_stat(struct annotated_data_stat *s)
{
#define PRINT_STAT(fld) if (s->fld) printf("%10d : %s\n", s->fld, #fld)

 int bad = s->no_sym +
   s->no_insn +
   s->no_insn_ops +
   s->no_mem_ops +
   s->no_reg +
   s->no_dbginfo +
   s->no_cuinfo +
   s->no_var +
   s->no_typeinfo +
   s->invalid_size +
   s->bad_offset;
 int ok = s->total - bad;

 printf("Annotate data type stats:\n");
 printf("total %d, ok %d (%.1f%%), bad %d (%.1f%%)\n",
  s->total, ok, 100.0 * ok / (s->total ?: 1), bad, 100.0 * bad / (s->total ?: 1));
 printf("-----------------------------------------------------------\n");
 PRINT_STAT(no_sym);
 PRINT_STAT(no_insn);
 PRINT_STAT(no_insn_ops);
 PRINT_STAT(no_mem_ops);
 PRINT_STAT(no_reg);
 PRINT_STAT(no_dbginfo);
 PRINT_STAT(no_cuinfo);
 PRINT_STAT(no_var);
 PRINT_STAT(no_typeinfo);
 PRINT_STAT(invalid_size);
 PRINT_STAT(bad_offset);
 PRINT_STAT(insn_track);
 printf("\n");

#undef PRINT_STAT
}

static void print_annotate_item_stat(struct list_head *head, const char *title)
{
 struct annotated_item_stat *istat, *pos, *iter;
 int total_good, total_bad, total;
 int sum1, sum2;
 LIST_HEAD(tmp);

 /* sort the list by count */
 list_splice_init(head, &tmp);
 total_good = total_bad = 0;

 list_for_each_entry_safe(istat, pos, &tmp, list) {
  total_good += istat->good;
  total_bad += istat->bad;
  sum1 = istat->good + istat->bad;

  list_for_each_entry(iter, head, list) {
   sum2 = iter->good + iter->bad;
   if (sum1 > sum2)
    break;
  }
  list_move_tail(&istat->list, &iter->list);
 }
 total = total_good + total_bad;

 printf("Annotate %s stats\n", title);
 printf("total %d, ok %d (%.1f%%), bad %d (%.1f%%)\n\n", total,
        total_good, 100.0 * total_good / (total ?: 1),
        total_bad, 100.0 * total_bad / (total ?: 1));
 printf(" %-20s: %5s %5s\n", "Name/opcode", "Good", "Bad");
 printf("-----------------------------------------------------------\n");
 list_for_each_entry(istat, head, list)
  printf(" %-20s: %5d %5d\n", istat->name, istat->good, istat->bad);
 printf("\n");
}

static void hists__find_annotations(struct hists *hists,
        struct evsel *evsel,
        struct perf_annotate *ann)
{
 struct rb_node *nd = rb_first_cached(&hists->entries), *next;
 int key = K_RIGHT;

 if (ann->type_stat)
  print_annotate_data_stat(&ann_data_stat);
 if (ann->insn_stat)
  print_annotate_item_stat(&ann_insn_stat, "Instruction");

 while (nd) {
  struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
  struct annotation *notes;

  if (he->ms.sym == NULL || dso__annotate_warned(map__dso(he->ms.map)))
   goto find_next;

  if (ann->sym_hist_filter &&
      (strcmp(he->ms.sym->name, ann->sym_hist_filter) != 0))
   goto find_next;

  if (ann->min_percent) {
   float percent = 0;
   u64 total = hists__total_period(hists);

   if (total)
    percent = 100.0 * he->stat.period / total;

   if (percent < ann->min_percent)
    goto find_next;
  }

  notes = symbol__annotation(he->ms.sym);
  if (notes->src == NULL) {
find_next:
   if (key == K_LEFT || key == '<')
    nd = rb_prev(nd);
   else
    nd = rb_next(nd);
   continue;
  }

  if (ann->data_type) {
   /* skip unknown type */
   if (he->mem_type->histograms == NULL)
    goto find_next;

   if (ann->target_data_type) {
    const char *type_name = he->mem_type->self.type_name;

    /* skip 'struct ' prefix in the type name */
    if (strncmp(ann->target_data_type, "struct ", 7) &&
        !strncmp(type_name, "struct ", 7))
     type_name += 7;

    /* skip 'union ' prefix in the type name */
    if (strncmp(ann->target_data_type, "union ", 6) &&
        !strncmp(type_name, "union ", 6))
     type_name += 6;

    if (strcmp(ann->target_data_type, type_name))
     goto find_next;
   }

   if (use_browser == 1)
    key = hist_entry__annotate_data_tui(he, evsel, NULL);
   else
    key = hist_entry__annotate_data_tty(he, evsel);

   switch (key) {
   case -1:
    if (!ann->skip_missing)
     return;
    /* fall through */
   case K_RIGHT:
   case '>':
    next = rb_next(nd);
    break;
   case K_LEFT:
   case '<':
    next = rb_prev(nd);
    break;
   default:
    return;
   }

   if (use_browser == 0 || next != NULL)
    nd = next;

   continue;
  }

  if (use_browser == 2) {
   int ret;
   int (*annotate)(struct hist_entry *he,
     struct evsel *evsel,
     struct hist_browser_timer *hbt);

   annotate = dlsym(perf_gtk_handle,
      "hist_entry__gtk_annotate");
   if (annotate == NULL) {
    ui__error("GTK browser not found!\n");
    return;
   }

   ret = annotate(he, evsel, NULL);
   if (!ret || !ann->skip_missing)
    return;

   /* skip missing symbols */
   nd = rb_next(nd);
  } else if (use_browser == 1) {
   key = hist_entry__tui_annotate(he, evsel, NULL);

   switch (key) {
   case -1:
    if (!ann->skip_missing)
     return;
    /* fall through */
   case K_RIGHT:
   case '>':
    next = rb_next(nd);
    break;
   case K_LEFT:
   case '<':
    next = rb_prev(nd);
    break;
   default:
    return;
   }

   if (next != NULL)
    nd = next;
  } else {
   hist_entry__stdio_annotate(he, evsel, ann);
   nd = rb_next(nd);
  }
 }
}

static int __cmd_annotate(struct perf_annotate *ann)
{
 int ret;
 struct perf_session *session = ann->session;
 struct evsel *pos;
 u64 total_nr_samples;

 if (ann->cpu_list) {
  ret = perf_session__cpu_bitmap(session, ann->cpu_list,
            ann->cpu_bitmap);
  if (ret)
   goto out;
 }

 if (!annotate_opts.objdump_path) {
  ret = perf_env__lookup_objdump(perf_session__env(session),
            &annotate_opts.objdump_path);
  if (ret)
   goto out;
 }

 ret = perf_session__process_events(session);
 if (ret)
  goto out;

 if (dump_trace) {
  perf_session__fprintf_nr_events(session, stdout);
  evlist__fprintf_nr_events(session->evlist, stdout);
  goto out;
 }

 if (verbose > 3)
  perf_session__fprintf(session, stdout);

 if (verbose > 2)
  perf_session__fprintf_dsos(session, stdout);

 total_nr_samples = 0;
 evlist__for_each_entry(session->evlist, pos) {
  struct hists *hists = evsel__hists(pos);
  u32 nr_samples = hists->stats.nr_samples;
  struct ui_progress prog;

  if (nr_samples > 0) {
   total_nr_samples += nr_samples;

   ui_progress__init(&prog, nr_samples,
       "Merging related events...");
   hists__collapse_resort(hists, &prog);
   ui_progress__finish();

   /* Don't sort callchain */
   evsel__reset_sample_bit(pos, CALLCHAIN);

   ui_progress__init(&prog, nr_samples,
       "Sorting events for output...");
   evsel__output_resort(pos, &prog);
   ui_progress__finish();

   /*
 * An event group needs to display other events too.
 * Let's delay printing until other events are processed.
 */
   if (symbol_conf.event_group) {
    if (!evsel__is_group_leader(pos)) {
     struct hists *leader_hists;

     leader_hists = evsel__hists(evsel__leader(pos));
     hists__match(leader_hists, hists);
     hists__link(leader_hists, hists);
    }
    continue;
   }

   hists__find_annotations(hists, pos, ann);
  }
 }

 if (total_nr_samples == 0) {
  ui__error("The %s data has no samples!\n", session->data->path);
  goto out;
 }

 /* Display group events together */
 evlist__for_each_entry(session->evlist, pos) {
  struct hists *hists = evsel__hists(pos);
  u32 nr_samples = hists->stats.nr_samples;
  struct ui_progress prog;
  struct evsel *evsel;

  if (!symbol_conf.event_group || !evsel__is_group_leader(pos))
   continue;

  for_each_group_member(evsel, pos)
   nr_samples += evsel__hists(evsel)->stats.nr_samples;

  if (nr_samples == 0)
   continue;

  ui_progress__init(&prog, nr_samples,
      "Sorting group events for output...");
  evsel__output_resort(pos, &prog);
  ui_progress__finish();

  hists__find_annotations(hists, pos, ann);
 }

 if (use_browser == 2) {
  void (*show_annotations)(void);

  show_annotations = dlsym(perf_gtk_handle,
      "perf_gtk__show_annotations");
  if (show_annotations == NULL) {
   ui__error("GTK browser not found!\n");
   goto out;
  }
  show_annotations();
 }

out:
 return ret;
}

static int parse_percent_limit(const struct option *opt, const char *str,
          int unset __maybe_unused)
{
 struct perf_annotate *ann = opt->value;
 double pcnt = strtof(str, NULL);

 ann->min_percent = pcnt;
 return 0;
}

static int parse_data_type(const struct option *opt, const char *str, int unset)
{
 struct perf_annotate *ann = opt->value;

 ann->data_type = !unset;
 if (str)
  ann->target_data_type = strdup(str);

 return 0;
}

static const char * const annotate_usage[] = {
 "perf annotate []",
 NULL
};

int cmd_annotate(int argc, const char **argv)
{
 struct perf_annotate annotate = {};
 struct perf_data data = {
  .mode  = PERF_DATA_MODE_READ,
 };
 struct itrace_synth_opts itrace_synth_opts = {
  .set = 0,
 };
 const char *disassembler_style = NULL, *objdump_path = NULL, *addr2line_path = NULL;
 struct option options[] = {
 OPT_STRING('i', "input", &input_name, "file",
      "input file name"),
 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
     "only consider symbols in these dsos"),
 OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
      "symbol to annotate"),
 OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
 OPT_INCR('v', "verbose", &verbose,
      "be more verbose (show symbol address, etc)"),
 OPT_BOOLEAN('q', "quiet", &quiet, "do now show any warnings or messages"),
 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
      "dump raw trace in ASCII"),
#ifdef HAVE_GTK2_SUPPORT
 OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
#endif
#ifdef HAVE_SLANG_SUPPORT
 OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
#endif
 OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
 OPT_BOOLEAN(0, "stdio2", &annotate.use_stdio2, "Use the stdio interface"),
 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
                    "don't load vmlinux even if found"),
 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
     "file", "vmlinux pathname"),
 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
      "load module symbols - WARNING: use only with -k and LIVE kernel"),
 OPT_BOOLEAN('l', "print-line", &annotate_opts.print_lines,
      "print matching source lines (may be slow)"),
 OPT_BOOLEAN('P', "full-paths", &annotate_opts.full_path,
      "Don't shorten the displayed pathnames"),
 OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
      "Skip symbols that cannot be annotated"),
 OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group,
   &annotate.group_set,
   "Show event group information together"),
 OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
 OPT_CALLBACK(0, "symfs", NULL, "directory",
       "Look for files with symbols relative to this directory",
       symbol__config_symfs),
 OPT_BOOLEAN(0, "source", &annotate_opts.annotate_src,
      "Interleave source code with assembly code (default)"),
 OPT_BOOLEAN(0, "asm-raw", &annotate_opts.show_asm_raw,
      "Display raw encoding of assembly instructions (default)"),
 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
     "Specify disassembler style (e.g. -M intel for intel syntax)"),
 OPT_STRING(0, "prefix", &annotate_opts.prefix, "prefix",
      "Add prefix to source file path names in programs (with --prefix-strip)"),
 OPT_STRING(0, "prefix-strip", &annotate_opts.prefix_strip, "N",
      "Strip first N entries of source file path name in programs (with --prefix)"),
 OPT_STRING(0, "objdump", &objdump_path, "path",
     "objdump binary to use for disassembly and annotations"),
 OPT_STRING(0, "addr2line", &addr2line_path, "path",
     "addr2line binary to use for line numbers"),
 OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
      "Enable symbol demangling"),
 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
      "Enable kernel symbol demangling"),
 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
      "Show a column with the sum of periods"),
 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
      "Show a column with the number of samples"),
 OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
        "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
        stdio__config_color, "always"),
 OPT_CALLBACK(0, "percent-type", &annotate_opts, "local-period",
       "Set percent type local/global-period/hits",
       annotate_parse_percent_type),
 OPT_CALLBACK(0, "percent-limit", &annotate, "percent",
       "Don't show entries under that percent", parse_percent_limit),
 OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
       "Instruction Tracing options\n" ITRACE_HELP,
       itrace_parse_synth_opts),
 OPT_CALLBACK_OPTARG(0, "data-type", &annotate, NULL, "name",
       "Show data type annotate for the memory accesses",
       parse_data_type),
 OPT_BOOLEAN(0, "type-stat", &annotate.type_stat,
      "Show stats for the data type annotation"),
 OPT_BOOLEAN(0, "insn-stat", &annotate.insn_stat,
      "Show instruction stats for the data type annotation"),
 OPT_BOOLEAN(0, "skip-empty", &symbol_conf.skip_empty,
      "Do not display empty (or dummy) events in the output"),
 OPT_BOOLEAN(0, "code-with-type", &annotate_opts.code_with_type,
      "Show data type info in code annotation (memory instructions only)"),
 OPT_END()
 };
 int ret;

 set_option_flag(options, 0, "show-total-period", PARSE_OPT_EXCLUSIVE);
 set_option_flag(options, 0, "show-nr-samples", PARSE_OPT_EXCLUSIVE);

 annotation_options__init();

 ret = hists__init();
 if (ret < 0)
  return ret;

 annotation_config__init();

 argc = parse_options(argc, argv, options, annotate_usage, 0);
 if (argc) {
  /*
 * Special case: if there's an argument left then assume that
 * it's a symbol filter:
 */
  if (argc > 1)
   usage_with_options(annotate_usage, options);

  annotate.sym_hist_filter = argv[0];
 }

 if (disassembler_style) {
  annotate_opts.disassembler_style = strdup(disassembler_style);
  if (!annotate_opts.disassembler_style)
   return -ENOMEM;
 }
 if (objdump_path) {
  annotate_opts.objdump_path = strdup(objdump_path);
  if (!annotate_opts.objdump_path)
   return -ENOMEM;
 }
 if (addr2line_path) {
  symbol_conf.addr2line_path = strdup(addr2line_path);
  if (!symbol_conf.addr2line_path)
   return -ENOMEM;
 }

 if (annotate_check_args() < 0)
  return -EINVAL;

#ifdef HAVE_GTK2_SUPPORT
 if (symbol_conf.show_nr_samples && annotate.use_gtk) {
  pr_err("--show-nr-samples is not available in --gtk mode at this time\n");
  return ret;
 }
#endif

#ifndef HAVE_LIBDW_SUPPORT
 if (annotate.data_type) {
  pr_err("Error: Data type profiling is disabled due to missing DWARF support\n");
  return -ENOTSUP;
 }
#endif

 ret = symbol__validate_sym_arguments();
 if (ret)
  return ret;

 if (quiet)
  perf_quiet_option();

 data.path = input_name;

 perf_tool__init(&annotate.tool, /*ordered_events=*/true);
 annotate.tool.sample = process_sample_event;
 annotate.tool.mmap = perf_event__process_mmap;
 annotate.tool.mmap2 = perf_event__process_mmap2;
 annotate.tool.comm = perf_event__process_comm;
 annotate.tool.exit = perf_event__process_exit;
 annotate.tool.fork = perf_event__process_fork;
 annotate.tool.namespaces = perf_event__process_namespaces;
 annotate.tool.attr = perf_event__process_attr;
 annotate.tool.build_id = perf_event__process_build_id;
#ifdef HAVE_LIBTRACEEVENT
 annotate.tool.tracing_data   = perf_event__process_tracing_data;
#endif
 annotate.tool.id_index = perf_event__process_id_index;
 annotate.tool.auxtrace_info = perf_event__process_auxtrace_info;
 annotate.tool.auxtrace = perf_event__process_auxtrace;
 annotate.tool.feature = process_feature_event;
 annotate.tool.ordering_requires_timestamps = true;

 annotate.session = perf_session__new(&data, &annotate.tool);
 if (IS_ERR(annotate.session))
  return PTR_ERR(annotate.session);

 annotate.session->itrace_synth_opts = &itrace_synth_opts;

 annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
            HEADER_BRANCH_STACK);

 if (annotate.group_set)
  evlist__force_leader(annotate.session->evlist);

 ret = symbol__annotation_init();
 if (ret < 0)
  goto out_delete;

 symbol_conf.try_vmlinux_path = true;

 ret = symbol__init(perf_session__env(annotate.session));
 if (ret < 0)
  goto out_delete;

 if (annotate.use_stdio || annotate.use_stdio2)
  use_browser = 0;
#ifdef HAVE_SLANG_SUPPORT
 else if (annotate.use_tui)
  use_browser = 1;
#endif
#ifdef HAVE_GTK2_SUPPORT
 else if (annotate.use_gtk)
  use_browser = 2;
#endif

 if (annotate.data_type) {
  annotate_opts.annotate_src = false;
  symbol_conf.annotate_data_member = true;
  symbol_conf.annotate_data_sample = true;
 } else if (annotate_opts.code_with_type) {
  symbol_conf.annotate_data_member = true;

  if (!annotate.use_stdio) {
   pr_err("--code-with-type only works with --stdio.\n");
   goto out_delete;
  }
 }

 setup_browser(true);

 /*
 * Events of different processes may correspond to the same
 * symbol, we do not care about the processes in annotate,
 * set sort order to avoid repeated output.
 */
 if (annotate.data_type)
  sort_order = "dso,type";
 else
  sort_order = "dso,symbol";

 /*
 * Set SORT_MODE__BRANCH so that annotate displays IPC/Cycle and
 * branch counters, if the corresponding branch info is available
 * in the perf data in the TUI mode.
 */
 if ((use_browser == 1 || annotate.use_stdio2) && annotate.has_br_stack) {
  sort__mode = SORT_MODE__BRANCH;
  if (annotate.session->evlist->nr_br_cntr > 0)
   annotate_opts.show_br_cntr = true;
 }

 if (setup_sorting(/*evlist=*/NULL, perf_session__env(annotate.session)) < 0)
  usage_with_options(annotate_usage, options);

 ret = __cmd_annotate(&annotate);

out_delete:
 /*
 * Speed up the exit process by only deleting for debug builds. For
 * large files this can save time.
 */
#ifndef NDEBUG
 perf_session__delete(annotate.session);
#endif
 annotation_options__exit();

 return ret;
}