Merge tag 'linux-cpupower-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel...

[mirror_ubuntu-hirsute-kernel.git] / tools / perf / builtin-report.c

// SPDX-License-Identifier: GPL-2.0
/*
 * builtin-report.c
 *
 * Builtin report 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 "util/config.h"

#include "util/annotate.h"
#include "util/color.h"
#include "util/dso.h"
#include <linux/list.h>
#include <linux/rbtree.h>
#include <linux/err.h>
#include <linux/zalloc.h>
#include "util/map.h"
#include "util/symbol.h"
#include "util/map_symbol.h"
#include "util/mem-events.h"
#include "util/branch.h"
#include "util/callchain.h"
#include "util/values.h"

#include "perf.h"
#include "util/debug.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/evswitch.h"
#include "util/header.h"
#include "util/session.h"
#include "util/srcline.h"
#include "util/tool.h"

#include <subcmd/parse-options.h>
#include <subcmd/exec-cmd.h>
#include "util/parse-events.h"

#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"
#include "util/data.h"
#include "arch/common.h"
#include "util/time-utils.h"
#include "util/auxtrace.h"
#include "util/units.h"
#include "util/util.h" // perf_tip()
#include "ui/ui.h"
#include "ui/progress.h"
#include "util/block-info.h"

#include <dlfcn.h>
#include <errno.h>
#include <inttypes.h>
#include <regex.h>
#include <linux/ctype.h>
#include <signal.h>
#include <linux/bitmap.h>
#include <linux/string.h>
#include <linux/stringify.h>
#include <linux/time64.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <linux/mman.h>

struct report {
        struct perf_tool        tool;
        struct perf_session     *session;
        struct evswitch         evswitch;
        bool                    use_tui, use_gtk, use_stdio;
        bool                    show_full_info;
        bool                    show_threads;
        bool                    inverted_callchain;
        bool                    mem_mode;
        bool                    stats_mode;
        bool                    tasks_mode;
        bool                    mmaps_mode;
        bool                    header;
        bool                    header_only;
        bool                    nonany_branch_mode;
        bool                    group_set;
        bool                    stitch_lbr;
        int                     max_stack;
        struct perf_read_values show_threads_values;
        struct annotation_options annotation_opts;
        const char              *pretty_printing_style;
        const char              *cpu_list;
        const char              *symbol_filter_str;
        const char              *time_str;
        struct perf_time_interval *ptime_range;
        int                     range_size;
        int                     range_num;
        float                   min_percent;
        u64                     nr_entries;
        u64                     queue_size;
        u64                     total_cycles;
        int                     socket_filter;
        DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
        struct branch_type_stat brtype_stat;
        bool                    symbol_ipc;
        bool                    total_cycles_mode;
        struct block_report     *block_reports;
        int                     nr_block_reports;
};

static int report__config(const char *var, const char *value, void *cb)
{
        struct report *rep = cb;

        if (!strcmp(var, "report.group")) {
                symbol_conf.event_group = perf_config_bool(var, value);
                return 0;
        }
        if (!strcmp(var, "report.percent-limit")) {
                double pcnt = strtof(value, NULL);

                rep->min_percent = pcnt;
                callchain_param.min_percent = pcnt;
                return 0;
        }
        if (!strcmp(var, "report.children")) {
                symbol_conf.cumulate_callchain = perf_config_bool(var, value);
                return 0;
        }
        if (!strcmp(var, "report.queue-size"))
                return perf_config_u64(&rep->queue_size, var, value);

        if (!strcmp(var, "report.sort_order")) {
                default_sort_order = strdup(value);
                return 0;
        }

        return 0;
}

static int hist_iter__report_callback(struct hist_entry_iter *iter,
                                      struct addr_location *al, bool single,
                                      void *arg)
{
        int err = 0;
        struct report *rep = arg;
        struct hist_entry *he = iter->he;
        struct evsel *evsel = iter->evsel;
        struct perf_sample *sample = iter->sample;
        struct mem_info *mi;
        struct branch_info *bi;

        if (!ui__has_annotation() && !rep->symbol_ipc)
                return 0;

        if (sort__mode == SORT_MODE__BRANCH) {
                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);

        } else if (rep->mem_mode) {
                mi = he->mem_info;
                err = addr_map_symbol__inc_samples(&mi->daddr, sample, evsel);
                if (err)
                        goto out;

                err = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);

        } else if (symbol_conf.cumulate_callchain) {
                if (single)
                        err = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
        } else {
                err = hist_entry__inc_addr_samples(he, sample, evsel, al->addr);
        }

out:
        return err;
}

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

        branch_type_count(&rep->brtype_stat, &bi->flags,
                          bi->from.addr, bi->to.addr);

        if (!ui__has_annotation() && !rep->symbol_ipc)
                return 0;

        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 void setup_forced_leader(struct report *report,
                                struct evlist *evlist)
{
        if (report->group_set)
                perf_evlist__force_leader(evlist);
}

static int process_feature_event(struct perf_session *session,
                                 union perf_event *event)
{
        struct report *rep = container_of(session->tool, struct report, tool);

        if (event->feat.feat_id < HEADER_LAST_FEATURE)
                return perf_event__process_feature(session, event);

        if (event->feat.feat_id != HEADER_LAST_FEATURE) {
                pr_err("failed: wrong feature ID: %" PRI_lu64 "\n",
                       event->feat.feat_id);
                return -1;
        }

        /*
         * (feat_id = HEADER_LAST_FEATURE) is the end marker which
         * means all features are received, now we can force the
         * group if needed.
         */
        setup_forced_leader(rep, session->evlist);
        return 0;
}

static int process_sample_event(struct perf_tool *tool,
                                union perf_event *event,
                                struct perf_sample *sample,
                                struct evsel *evsel,
                                struct machine *machine)
{
        struct report *rep = container_of(tool, struct report, tool);
        struct addr_location al;
        struct hist_entry_iter iter = {
                .evsel                  = evsel,
                .sample                 = sample,
                .hide_unresolved        = symbol_conf.hide_unresolved,
                .add_entry_cb           = hist_iter__report_callback,
        };
        int ret = 0;

        if (perf_time__ranges_skip_sample(rep->ptime_range, rep->range_num,
                                          sample->time)) {
                return 0;
        }

        if (evswitch__discard(&rep->evswitch, evsel))
                return 0;

        if (machine__resolve(machine, &al, sample) < 0) {
                pr_debug("problem processing %d event, skipping it.\n",
                         event->header.type);
                return -1;
        }

        if (rep->stitch_lbr)
                al.thread->lbr_stitch_enable = true;

        if (symbol_conf.hide_unresolved && al.sym == NULL)
                goto out_put;

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

        if (sort__mode == SORT_MODE__BRANCH) {
                /*
                 * A non-synthesized event might not have a branch stack if
                 * branch stacks have been synthesized (using itrace options).
                 */
                if (!sample->branch_stack)
                        goto out_put;

                iter.add_entry_cb = hist_iter__branch_callback;
                iter.ops = &hist_iter_branch;
        } else if (rep->mem_mode) {
                iter.ops = &hist_iter_mem;
        } else if (symbol_conf.cumulate_callchain) {
                iter.ops = &hist_iter_cumulative;
        } else {
                iter.ops = &hist_iter_normal;
        }

        if (al.map != NULL)
                al.map->dso->hit = 1;

        if (ui__has_annotation() || rep->symbol_ipc || rep->total_cycles_mode) {
                hist__account_cycles(sample->branch_stack, &al, sample,
                                     rep->nonany_branch_mode,
                                     &rep->total_cycles);
        }

        ret = hist_entry_iter__add(&iter, &al, rep->max_stack, rep);
        if (ret < 0)
                pr_debug("problem adding hist entry, skipping event\n");
out_put:
        addr_location__put(&al);
        return ret;
}

static int process_read_event(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample __maybe_unused,
                              struct evsel *evsel,
                              struct machine *machine __maybe_unused)
{
        struct report *rep = container_of(tool, struct report, tool);

        if (rep->show_threads) {
                const char *name = evsel__name(evsel);
                int err = perf_read_values_add_value(&rep->show_threads_values,
                                           event->read.pid, event->read.tid,
                                           evsel->idx,
                                           name,
                                           event->read.value);

                if (err)
                        return err;
        }

        return 0;
}

/* For pipe mode, sample_type is not currently set */
static int report__setup_sample_type(struct report *rep)
{
        struct perf_session *session = rep->session;
        u64 sample_type = evlist__combined_sample_type(session->evlist);
        bool is_pipe = perf_data__is_pipe(session->data);

        if (session->itrace_synth_opts->callchain ||
            session->itrace_synth_opts->add_callchain ||
            (!is_pipe &&
             perf_header__has_feat(&session->header, HEADER_AUXTRACE) &&
             !session->itrace_synth_opts->set))
                sample_type |= PERF_SAMPLE_CALLCHAIN;

        if (session->itrace_synth_opts->last_branch ||
            session->itrace_synth_opts->add_last_branch)
                sample_type |= PERF_SAMPLE_BRANCH_STACK;

        if (!is_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
                if (perf_hpp_list.parent) {
                        ui__error("Selected --sort parent, but no "
                                    "callchain data. Did you call "
                                    "'perf record' without -g?\n");
                        return -EINVAL;
                }
                if (symbol_conf.use_callchain &&
                        !symbol_conf.show_branchflag_count) {
                        ui__error("Selected -g or --branch-history.\n"
                                  "But no callchain or branch data.\n"
                                  "Did you call 'perf record' without -g or -b?\n");
                        return -1;
                }
        } else if (!callchain_param.enabled &&
                   callchain_param.mode != CHAIN_NONE &&
                   !symbol_conf.use_callchain) {
                        symbol_conf.use_callchain = true;
                        if (callchain_register_param(&callchain_param) < 0) {
                                ui__error("Can't register callchain params.\n");
                                return -EINVAL;
                        }
        }

        if (symbol_conf.cumulate_callchain) {
                /* Silently ignore if callchain is missing */
                if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
                        symbol_conf.cumulate_callchain = false;
                        perf_hpp__cancel_cumulate();
                }
        }

        if (sort__mode == SORT_MODE__BRANCH) {
                if (!is_pipe &&
                    !(sample_type & PERF_SAMPLE_BRANCH_STACK)) {
                        ui__error("Selected -b but no branch data. "
                                  "Did you call perf record without -b?\n");
                        return -1;
                }
        }

        if (sort__mode == SORT_MODE__MEMORY) {
                if (!is_pipe && !(sample_type & PERF_SAMPLE_DATA_SRC)) {
                        ui__error("Selected --mem-mode but no mem data. "
                                  "Did you call perf record without -d?\n");
                        return -1;
                }
        }

        callchain_param_setup(sample_type);

        if (rep->stitch_lbr && (callchain_param.record_mode != CALLCHAIN_LBR)) {
                ui__warning("Can't find LBR callchain. Switch off --stitch-lbr.\n"
                            "Please apply --call-graph lbr when recording.\n");
                rep->stitch_lbr = false;
        }

        /* ??? handle more cases than just ANY? */
        if (!(evlist__combined_branch_type(session->evlist) & PERF_SAMPLE_BRANCH_ANY))
                rep->nonany_branch_mode = true;

#if !defined(HAVE_LIBUNWIND_SUPPORT) && !defined(HAVE_DWARF_SUPPORT)
        if (dwarf_callchain_users) {
                ui__warning("Please install libunwind or libdw "
                            "development packages during the perf build.\n");
        }
#endif

        return 0;
}

static void sig_handler(int sig __maybe_unused)
{
        session_done = 1;
}

static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report *rep,
                                              const char *evname, FILE *fp)
{
        size_t ret;
        char unit;
        unsigned long nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
        u64 nr_events = hists->stats.total_period;
        struct evsel *evsel = hists_to_evsel(hists);
        char buf[512];
        size_t size = sizeof(buf);
        int socked_id = hists->socket_filter;

        if (quiet)
                return 0;

        if (symbol_conf.filter_relative) {
                nr_samples = hists->stats.nr_non_filtered_samples;
                nr_events = hists->stats.total_non_filtered_period;
        }

        if (evsel__is_group_event(evsel)) {
                struct evsel *pos;

                evsel__group_desc(evsel, buf, size);
                evname = buf;

                for_each_group_member(pos, evsel) {
                        const struct hists *pos_hists = evsel__hists(pos);

                        if (symbol_conf.filter_relative) {
                                nr_samples += pos_hists->stats.nr_non_filtered_samples;
                                nr_events += pos_hists->stats.total_non_filtered_period;
                        } else {
                                nr_samples += pos_hists->stats.nr_events[PERF_RECORD_SAMPLE];
                                nr_events += pos_hists->stats.total_period;
                        }
                }
        }

        nr_samples = convert_unit(nr_samples, &unit);
        ret = fprintf(fp, "# Samples: %lu%c", nr_samples, unit);
        if (evname != NULL) {
                ret += fprintf(fp, " of event%s '%s'",
                               evsel->core.nr_members > 1 ? "s" : "", evname);
        }

        if (rep->time_str)
                ret += fprintf(fp, " (time slices: %s)", rep->time_str);

        if (symbol_conf.show_ref_callgraph && evname && strstr(evname, "call-graph=no")) {
                ret += fprintf(fp, ", show reference callgraph");
        }

        if (rep->mem_mode) {
                ret += fprintf(fp, "\n# Total weight : %" PRIu64, nr_events);
                ret += fprintf(fp, "\n# Sort order   : %s", sort_order ? : default_mem_sort_order);
        } else
                ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64, nr_events);

        if (socked_id > -1)
                ret += fprintf(fp, "\n# Processor Socket: %d", socked_id);

        return ret + fprintf(fp, "\n#\n");
}

static int perf_evlist__tui_block_hists_browse(struct evlist *evlist,
                                               struct report *rep)
{
        struct evsel *pos;
        int i = 0, ret;

        evlist__for_each_entry(evlist, pos) {
                ret = report__browse_block_hists(&rep->block_reports[i++].hist,
                                                 rep->min_percent, pos,
                                                 &rep->session->header.env,
                                                 &rep->annotation_opts);
                if (ret != 0)
                        return ret;
        }

        return 0;
}

static int perf_evlist__tty_browse_hists(struct evlist *evlist,
                                         struct report *rep,
                                         const char *help)
{
        struct evsel *pos;
        int i = 0;

        if (!quiet) {
                fprintf(stdout, "#\n# Total Lost Samples: %" PRIu64 "\n#\n",
                        evlist->stats.total_lost_samples);
        }

        evlist__for_each_entry(evlist, pos) {
                struct hists *hists = evsel__hists(pos);
                const char *evname = evsel__name(pos);

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

                hists__fprintf_nr_sample_events(hists, rep, evname, stdout);

                if (rep->total_cycles_mode) {
                        report__browse_block_hists(&rep->block_reports[i++].hist,
                                                   rep->min_percent, pos,
                                                   NULL, NULL);
                        continue;
                }

                hists__fprintf(hists, !quiet, 0, 0, rep->min_percent, stdout,
                               !(symbol_conf.use_callchain ||
                                 symbol_conf.show_branchflag_count));
                fprintf(stdout, "\n\n");
        }

        if (!quiet)
                fprintf(stdout, "#\n# (%s)\n#\n", help);

        if (rep->show_threads) {
                bool style = !strcmp(rep->pretty_printing_style, "raw");
                perf_read_values_display(stdout, &rep->show_threads_values,
                                         style);
                perf_read_values_destroy(&rep->show_threads_values);
        }

        if (sort__mode == SORT_MODE__BRANCH)
                branch_type_stat_display(stdout, &rep->brtype_stat);

        return 0;
}

static void report__warn_kptr_restrict(const struct report *rep)
{
        struct map *kernel_map = machine__kernel_map(&rep->session->machines.host);
        struct kmap *kernel_kmap = kernel_map ? map__kmap(kernel_map) : NULL;

        if (perf_evlist__exclude_kernel(rep->session->evlist))
                return;

        if (kernel_map == NULL ||
            (kernel_map->dso->hit &&
             (kernel_kmap->ref_reloc_sym == NULL ||
              kernel_kmap->ref_reloc_sym->addr == 0))) {
                const char *desc =
                    "As no suitable kallsyms nor vmlinux was found, kernel samples\n"
                    "can't be resolved.";

                if (kernel_map && map__has_symbols(kernel_map)) {
                        desc = "If some relocation was applied (e.g. "
                               "kexec) symbols may be misresolved.";
                }

                ui__warning(
"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
"Samples in kernel modules can't be resolved as well.\n\n",
                desc);
        }
}

static int report__gtk_browse_hists(struct report *rep, const char *help)
{
        int (*hist_browser)(struct evlist *evlist, const char *help,
                            struct hist_browser_timer *timer, float min_pcnt);

        hist_browser = dlsym(perf_gtk_handle, "perf_evlist__gtk_browse_hists");

        if (hist_browser == NULL) {
                ui__error("GTK browser not found!\n");
                return -1;
        }

        return hist_browser(rep->session->evlist, help, NULL, rep->min_percent);
}

static int report__browse_hists(struct report *rep)
{
        int ret;
        struct perf_session *session = rep->session;
        struct evlist *evlist = session->evlist;
        const char *help = perf_tip(system_path(TIPDIR));

        if (help == NULL) {
                /* fallback for people who don't install perf ;-) */
                help = perf_tip(DOCDIR);
                if (help == NULL)
                        help = "Cannot load tips.txt file, please install perf!";
        }

        switch (use_browser) {
        case 1:
                if (rep->total_cycles_mode) {
                        ret = perf_evlist__tui_block_hists_browse(evlist, rep);
                        break;
                }

                ret = perf_evlist__tui_browse_hists(evlist, help, NULL,
                                                    rep->min_percent,
                                                    &session->header.env,
                                                    true, &rep->annotation_opts);
                /*
                 * Usually "ret" is the last pressed key, and we only
                 * care if the key notifies us to switch data file.
                 */
                if (ret != K_SWITCH_INPUT_DATA && ret != K_RELOAD)
                        ret = 0;
                break;
        case 2:
                ret = report__gtk_browse_hists(rep, help);
                break;
        default:
                ret = perf_evlist__tty_browse_hists(evlist, rep, help);
                break;
        }

        return ret;
}

static int report__collapse_hists(struct report *rep)
{
        struct ui_progress prog;
        struct evsel *pos;
        int ret = 0;

        ui_progress__init(&prog, rep->nr_entries, "Merging related events...");

        evlist__for_each_entry(rep->session->evlist, pos) {
                struct hists *hists = evsel__hists(pos);

                if (pos->idx == 0)
                        hists->symbol_filter_str = rep->symbol_filter_str;

                hists->socket_filter = rep->socket_filter;

                ret = hists__collapse_resort(hists, &prog);
                if (ret < 0)
                        break;

                /* Non-group events are considered as leader */
                if (symbol_conf.event_group && !evsel__is_group_leader(pos)) {
                        struct hists *leader_hists = evsel__hists(pos->leader);

                        hists__match(leader_hists, hists);
                        hists__link(leader_hists, hists);
                }
        }

        ui_progress__finish();
        return ret;
}

static int hists__resort_cb(struct hist_entry *he, void *arg)
{
        struct report *rep = arg;
        struct symbol *sym = he->ms.sym;

        if (rep->symbol_ipc && sym && !sym->annotate2) {
                struct evsel *evsel = hists_to_evsel(he->hists);

                symbol__annotate2(&he->ms, evsel,
                                  &annotation__default_options, NULL);
        }

        return 0;
}

static void report__output_resort(struct report *rep)
{
        struct ui_progress prog;
        struct evsel *pos;

        ui_progress__init(&prog, rep->nr_entries, "Sorting events for output...");

        evlist__for_each_entry(rep->session->evlist, pos) {
                evsel__output_resort_cb(pos, &prog, hists__resort_cb, rep);
        }

        ui_progress__finish();
}

static void stats_setup(struct report *rep)
{
        memset(&rep->tool, 0, sizeof(rep->tool));
        rep->tool.no_warn = true;
}

static int stats_print(struct report *rep)
{
        struct perf_session *session = rep->session;

        perf_session__fprintf_nr_events(session, stdout);
        return 0;
}

static void tasks_setup(struct report *rep)
{
        memset(&rep->tool, 0, sizeof(rep->tool));
        rep->tool.ordered_events = true;
        if (rep->mmaps_mode) {
                rep->tool.mmap = perf_event__process_mmap;
                rep->tool.mmap2 = perf_event__process_mmap2;
        }
        rep->tool.comm = perf_event__process_comm;
        rep->tool.exit = perf_event__process_exit;
        rep->tool.fork = perf_event__process_fork;
        rep->tool.no_warn = true;
}

struct task {
        struct thread           *thread;
        struct list_head         list;
        struct list_head         children;
};

static struct task *tasks_list(struct task *task, struct machine *machine)
{
        struct thread *parent_thread, *thread = task->thread;
        struct task   *parent_task;

        /* Already listed. */
        if (!list_empty(&task->list))
                return NULL;

        /* Last one in the chain. */
        if (thread->ppid == -1)
                return task;

        parent_thread = machine__find_thread(machine, -1, thread->ppid);
        if (!parent_thread)
                return ERR_PTR(-ENOENT);

        parent_task = thread__priv(parent_thread);
        list_add_tail(&task->list, &parent_task->children);
        return tasks_list(parent_task, machine);
}

static size_t maps__fprintf_task(struct maps *maps, int indent, FILE *fp)
{
        size_t printed = 0;
        struct map *map;

        maps__for_each_entry(maps, map) {
                printed += fprintf(fp, "%*s  %" PRIx64 "-%" PRIx64 " %c%c%c%c %08" PRIx64 " %" PRIu64 " %s\n",
                                   indent, "", map->start, map->end,
                                   map->prot & PROT_READ ? 'r' : '-',
                                   map->prot & PROT_WRITE ? 'w' : '-',
                                   map->prot & PROT_EXEC ? 'x' : '-',
                                   map->flags & MAP_SHARED ? 's' : 'p',
                                   map->pgoff,
                                   map->dso->id.ino, map->dso->name);
        }

        return printed;
}

static void task__print_level(struct task *task, FILE *fp, int level)
{
        struct thread *thread = task->thread;
        struct task *child;
        int comm_indent = fprintf(fp, "  %8d %8d %8d |%*s",
                                  thread->pid_, thread->tid, thread->ppid,
                                  level, "");

        fprintf(fp, "%s\n", thread__comm_str(thread));

        maps__fprintf_task(thread->maps, comm_indent, fp);

        if (!list_empty(&task->children)) {
                list_for_each_entry(child, &task->children, list)
                        task__print_level(child, fp, level + 1);
        }
}

static int tasks_print(struct report *rep, FILE *fp)
{
        struct perf_session *session = rep->session;
        struct machine      *machine = &session->machines.host;
        struct task *tasks, *task;
        unsigned int nr = 0, itask = 0, i;
        struct rb_node *nd;
        LIST_HEAD(list);

        /*
         * No locking needed while accessing machine->threads,
         * because --tasks is single threaded command.
         */

        /* Count all the threads. */
        for (i = 0; i < THREADS__TABLE_SIZE; i++)
                nr += machine->threads[i].nr;

        tasks = malloc(sizeof(*tasks) * nr);
        if (!tasks)
                return -ENOMEM;

        for (i = 0; i < THREADS__TABLE_SIZE; i++) {
                struct threads *threads = &machine->threads[i];

                for (nd = rb_first_cached(&threads->entries); nd;
                     nd = rb_next(nd)) {
                        task = tasks + itask++;

                        task->thread = rb_entry(nd, struct thread, rb_node);
                        INIT_LIST_HEAD(&task->children);
                        INIT_LIST_HEAD(&task->list);
                        thread__set_priv(task->thread, task);
                }
        }

        /*
         * Iterate every task down to the unprocessed parent
         * and link all in task children list. Task with no
         * parent is added into 'list'.
         */
        for (itask = 0; itask < nr; itask++) {
                task = tasks + itask;

                if (!list_empty(&task->list))
                        continue;

                task = tasks_list(task, machine);
                if (IS_ERR(task)) {
                        pr_err("Error: failed to process tasks\n");
                        free(tasks);
                        return PTR_ERR(task);
                }

                if (task)
                        list_add_tail(&task->list, &list);
        }

        fprintf(fp, "# %8s %8s %8s  %s\n", "pid", "tid", "ppid", "comm");

        list_for_each_entry(task, &list, list)
                task__print_level(task, fp, 0);

        free(tasks);
        return 0;
}

static int __cmd_report(struct report *rep)
{
        int ret;
        struct perf_session *session = rep->session;
        struct evsel *pos;
        struct perf_data *data = session->data;

        signal(SIGINT, sig_handler);

        if (rep->cpu_list) {
                ret = perf_session__cpu_bitmap(session, rep->cpu_list,
                                               rep->cpu_bitmap);
                if (ret) {
                        ui__error("failed to set cpu bitmap\n");
                        return ret;
                }
                session->itrace_synth_opts->cpu_bitmap = rep->cpu_bitmap;
        }

        if (rep->show_threads) {
                ret = perf_read_values_init(&rep->show_threads_values);
                if (ret)
                        return ret;
        }

        ret = report__setup_sample_type(rep);
        if (ret) {
                /* report__setup_sample_type() already showed error message */
                return ret;
        }

        if (rep->stats_mode)
                stats_setup(rep);

        if (rep->tasks_mode)
                tasks_setup(rep);

        ret = perf_session__process_events(session);
        if (ret) {
                ui__error("failed to process sample\n");
                return ret;
        }

        if (rep->stats_mode)
                return stats_print(rep);

        if (rep->tasks_mode)
                return tasks_print(rep, stdout);

        report__warn_kptr_restrict(rep);

        evlist__for_each_entry(session->evlist, pos)
                rep->nr_entries += evsel__hists(pos)->nr_entries;

        if (use_browser == 0) {
                if (verbose > 3)
                        perf_session__fprintf(session, stdout);

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

                if (dump_trace) {
                        perf_session__fprintf_nr_events(session, stdout);
                        perf_evlist__fprintf_nr_events(session->evlist, stdout);
                        return 0;
                }
        }

        ret = report__collapse_hists(rep);
        if (ret) {
                ui__error("failed to process hist entry\n");
                return ret;
        }

        if (session_done())
                return 0;

        /*
         * recalculate number of entries after collapsing since it
         * might be changed during the collapse phase.
         */
        rep->nr_entries = 0;
        evlist__for_each_entry(session->evlist, pos)
                rep->nr_entries += evsel__hists(pos)->nr_entries;

        if (rep->nr_entries == 0) {
                ui__error("The %s data has no samples!\n", data->path);
                return 0;
        }

        report__output_resort(rep);

        if (rep->total_cycles_mode) {
                int block_hpps[6] = {
                        PERF_HPP_REPORT__BLOCK_TOTAL_CYCLES_PCT,
                        PERF_HPP_REPORT__BLOCK_LBR_CYCLES,
                        PERF_HPP_REPORT__BLOCK_CYCLES_PCT,
                        PERF_HPP_REPORT__BLOCK_AVG_CYCLES,
                        PERF_HPP_REPORT__BLOCK_RANGE,
                        PERF_HPP_REPORT__BLOCK_DSO,
                };

                rep->block_reports = block_info__create_report(session->evlist,
                                                               rep->total_cycles,
                                                               block_hpps, 6,
                                                               &rep->nr_block_reports);
                if (!rep->block_reports)
                        return -1;
        }

        return report__browse_hists(rep);
}

static int
report_parse_callchain_opt(const struct option *opt, const char *arg, int unset)
{
        struct callchain_param *callchain = opt->value;

        callchain->enabled = !unset;
        /*
         * --no-call-graph
         */
        if (unset) {
                symbol_conf.use_callchain = false;
                callchain->mode = CHAIN_NONE;
                return 0;
        }

        return parse_callchain_report_opt(arg);
}

static int
parse_time_quantum(const struct option *opt, const char *arg,
                   int unset __maybe_unused)
{
        unsigned long *time_q = opt->value;
        char *end;

        *time_q = strtoul(arg, &end, 0);
        if (end == arg)
                goto parse_err;
        if (*time_q == 0) {
                pr_err("time quantum cannot be 0");
                return -1;
        }
        end = skip_spaces(end);
        if (*end == 0)
                return 0;
        if (!strcmp(end, "s")) {
                *time_q *= NSEC_PER_SEC;
                return 0;
        }
        if (!strcmp(end, "ms")) {
                *time_q *= NSEC_PER_MSEC;
                return 0;
        }
        if (!strcmp(end, "us")) {
                *time_q *= NSEC_PER_USEC;
                return 0;
        }
        if (!strcmp(end, "ns"))
                return 0;
parse_err:
        pr_err("Cannot parse time quantum `%s'\n", arg);
        return -1;
}

int
report_parse_ignore_callees_opt(const struct option *opt __maybe_unused,
                                const char *arg, int unset __maybe_unused)
{
        if (arg) {
                int err = regcomp(&ignore_callees_regex, arg, REG_EXTENDED);
                if (err) {
                        char buf[BUFSIZ];
                        regerror(err, &ignore_callees_regex, buf, sizeof(buf));
                        pr_err("Invalid --ignore-callees regex: %s\n%s", arg, buf);
                        return -1;
                }
                have_ignore_callees = 1;
        }

        return 0;
}

static int
parse_branch_mode(const struct option *opt,
                  const char *str __maybe_unused, int unset)
{
        int *branch_mode = opt->value;

        *branch_mode = !unset;
        return 0;
}

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

        rep->min_percent = pcnt;
        callchain_param.min_percent = pcnt;
        return 0;
}

static int process_attr(struct perf_tool *tool __maybe_unused,
                        union perf_event *event,
                        struct evlist **pevlist)
{
        u64 sample_type;
        int err;

        err = perf_event__process_attr(tool, event, pevlist);
        if (err)
                return err;

        /*
         * Check if we need to enable callchains based
         * on events sample_type.
         */
        sample_type = evlist__combined_sample_type(*pevlist);
        callchain_param_setup(sample_type);
        return 0;
}

int cmd_report(int argc, const char **argv)
{
        struct perf_session *session;
        struct itrace_synth_opts itrace_synth_opts = { .set = 0, };
        struct stat st;
        bool has_br_stack = false;
        int branch_mode = -1;
        int last_key = 0;
        bool branch_call_mode = false;
#define CALLCHAIN_DEFAULT_OPT  "graph,0.5,caller,function,percent"
        static const char report_callchain_help[] = "Display call graph (stack chain/backtrace):\n\n"
                                                    CALLCHAIN_REPORT_HELP
                                                    "\n\t\t\t\tDefault: " CALLCHAIN_DEFAULT_OPT;
        char callchain_default_opt[] = CALLCHAIN_DEFAULT_OPT;
        const char * const report_usage[] = {
                "perf report [<options>]",
                NULL
        };
        struct report report = {
                .tool = {
                        .sample          = process_sample_event,
                        .mmap            = perf_event__process_mmap,
                        .mmap2           = perf_event__process_mmap2,
                        .comm            = perf_event__process_comm,
                        .namespaces      = perf_event__process_namespaces,
                        .cgroup          = perf_event__process_cgroup,
                        .exit            = perf_event__process_exit,
                        .fork            = perf_event__process_fork,
                        .lost            = perf_event__process_lost,
                        .read            = process_read_event,
                        .attr            = process_attr,
                        .tracing_data    = perf_event__process_tracing_data,
                        .build_id        = perf_event__process_build_id,
                        .id_index        = perf_event__process_id_index,
                        .auxtrace_info   = perf_event__process_auxtrace_info,
                        .auxtrace        = perf_event__process_auxtrace,
                        .event_update    = perf_event__process_event_update,
                        .feature         = process_feature_event,
                        .ordered_events  = true,
                        .ordering_requires_timestamps = true,
                },
                .max_stack               = PERF_MAX_STACK_DEPTH,
                .pretty_printing_style   = "normal",
                .socket_filter           = -1,
                .annotation_opts         = annotation__default_options,
        };
        const struct option options[] = {
        OPT_STRING('i', "input", &input_name, "file",
                    "input file name"),
        OPT_INCR('v', "verbose", &verbose,
                    "be more verbose (show symbol address, etc)"),
        OPT_BOOLEAN('q', "quiet", &quiet, "Do not show any message"),
        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
                    "dump raw trace in ASCII"),
        OPT_BOOLEAN(0, "stats", &report.stats_mode, "Display event stats"),
        OPT_BOOLEAN(0, "tasks", &report.tasks_mode, "Display recorded tasks"),
        OPT_BOOLEAN(0, "mmaps", &report.mmaps_mode, "Display recorded tasks memory maps"),
        OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
                   "file", "vmlinux pathname"),
        OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
                    "don't load vmlinux even if found"),
        OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
                   "file", "kallsyms pathname"),
        OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
        OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
                    "load module symbols - WARNING: use only with -k and LIVE kernel"),
        OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
                    "Show a column with the number of samples"),
        OPT_BOOLEAN('T', "threads", &report.show_threads,
                    "Show per-thread event counters"),
        OPT_STRING(0, "pretty", &report.pretty_printing_style, "key",
                   "pretty printing style key: normal raw"),
        OPT_BOOLEAN(0, "tui", &report.use_tui, "Use the TUI interface"),
        OPT_BOOLEAN(0, "gtk", &report.use_gtk, "Use the GTK2 interface"),
        OPT_BOOLEAN(0, "stdio", &report.use_stdio,
                    "Use the stdio interface"),
        OPT_BOOLEAN(0, "header", &report.header, "Show data header."),
        OPT_BOOLEAN(0, "header-only", &report.header_only,
                    "Show only data header."),
        OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
                   sort_help("sort by key(s):")),
        OPT_STRING('F', "fields", &field_order, "key[,keys...]",
                   sort_help("output field(s): overhead period sample ")),
        OPT_BOOLEAN(0, "show-cpu-utilization", &symbol_conf.show_cpu_utilization,
                    "Show sample percentage for different cpu modes"),
        OPT_BOOLEAN_FLAG(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
                    "Show sample percentage for different cpu modes", PARSE_OPT_HIDDEN),
        OPT_STRING('p', "parent", &parent_pattern, "regex",
                   "regex filter to identify parent, see: '--sort parent'"),
        OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
                    "Only display entries with parent-match"),
        OPT_CALLBACK_DEFAULT('g', "call-graph", &callchain_param,
                             "print_type,threshold[,print_limit],order,sort_key[,branch],value",
                             report_callchain_help, &report_parse_callchain_opt,
                             callchain_default_opt),
        OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
                    "Accumulate callchains of children and show total overhead as well. "
                    "Enabled by default, use --no-children to disable."),
        OPT_INTEGER(0, "max-stack", &report.max_stack,
                    "Set the maximum stack depth when parsing the callchain, "
                    "anything beyond the specified depth will be ignored. "
                    "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
        OPT_BOOLEAN('G', "inverted", &report.inverted_callchain,
                    "alias for inverted call graph"),
        OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
                   "ignore callees of these functions in call graphs",
                   report_parse_ignore_callees_opt),
        OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
                   "only consider symbols in these dsos"),
        OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
                   "only consider symbols in these comms"),
        OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
                   "only consider symbols in these pids"),
        OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
                   "only consider symbols in these tids"),
        OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
                   "only consider these symbols"),
        OPT_STRING(0, "symbol-filter", &report.symbol_filter_str, "filter",
                   "only show symbols that (partially) match with this filter"),
        OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
                   "width[,width...]",
                   "don't try to adjust column width, use these fixed values"),
        OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",
                   "separator for columns, no spaces will be added between "
                   "columns '.' is reserved."),
        OPT_BOOLEAN('U', "hide-unresolved", &symbol_conf.hide_unresolved,
                    "Only display entries resolved to a symbol"),
        OPT_CALLBACK(0, "symfs", NULL, "directory",
                     "Look for files with symbols relative to this directory",
                     symbol__config_symfs),
        OPT_STRING('C', "cpu", &report.cpu_list, "cpu",
                   "list of cpus to profile"),
        OPT_BOOLEAN('I', "show-info", &report.show_full_info,
                    "Display extended information about perf.data file"),
        OPT_BOOLEAN(0, "source", &report.annotation_opts.annotate_src,
                    "Interleave source code with assembly code (default)"),
        OPT_BOOLEAN(0, "asm-raw", &report.annotation_opts.show_asm_raw,
                    "Display raw encoding of assembly instructions (default)"),
        OPT_STRING('M', "disassembler-style", &report.annotation_opts.disassembler_style, "disassembler style",
                   "Specify disassembler style (e.g. -M intel for intel syntax)"),
        OPT_STRING(0, "prefix", &report.annotation_opts.prefix, "prefix",
                    "Add prefix to source file path names in programs (with --prefix-strip)"),
        OPT_STRING(0, "prefix-strip", &report.annotation_opts.prefix_strip, "N",
                    "Strip first N entries of source file path name in programs (with --prefix)"),
        OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
                    "Show a column with the sum of periods"),
        OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &report.group_set,
                    "Show event group information together"),
        OPT_INTEGER(0, "group-sort-idx", &symbol_conf.group_sort_idx,
                    "Sort the output by the event at the index n in group. "
                    "If n is invalid, sort by the first event. "
                    "WARNING: should be used on grouped events."),
        OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
                    "use branch records for per branch histogram filling",
                    parse_branch_mode),
        OPT_BOOLEAN(0, "branch-history", &branch_call_mode,
                    "add last branch records to call history"),
        OPT_STRING(0, "objdump", &report.annotation_opts.objdump_path, "path",
                   "objdump binary to use for disassembly and annotations"),
        OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
                    "Disable symbol demangling"),
        OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
                    "Enable kernel symbol demangling"),
        OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
        OPT_INTEGER(0, "samples", &symbol_conf.res_sample,
                    "Number of samples to save per histogram entry for individual browsing"),
        OPT_CALLBACK(0, "percent-limit", &report, "percent",
                     "Don't show entries under that percent", parse_percent_limit),
        OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
                     "how to display percentage of filtered entries", parse_filter_percentage),
        OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
                            "Instruction Tracing options\n" ITRACE_HELP,
                            itrace_parse_synth_opts),
        OPT_BOOLEAN(0, "full-source-path", &srcline_full_filename,
                        "Show full source file name path for source lines"),
        OPT_BOOLEAN(0, "show-ref-call-graph", &symbol_conf.show_ref_callgraph,
                    "Show callgraph from reference event"),
        OPT_BOOLEAN(0, "stitch-lbr", &report.stitch_lbr,
                    "Enable LBR callgraph stitching approach"),
        OPT_INTEGER(0, "socket-filter", &report.socket_filter,
                    "only show processor socket that match with this filter"),
        OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
                    "Show raw trace event output (do not use print fmt or plugins)"),
        OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
                    "Show entries in a hierarchy"),
        OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
                             "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
                             stdio__config_color, "always"),
        OPT_STRING(0, "time", &report.time_str, "str",
                   "Time span of interest (start,stop)"),
        OPT_BOOLEAN(0, "inline", &symbol_conf.inline_name,
                    "Show inline function"),
        OPT_CALLBACK(0, "percent-type", &report.annotation_opts, "local-period",
                     "Set percent type local/global-period/hits",
                     annotate_parse_percent_type),
        OPT_BOOLEAN(0, "ns", &symbol_conf.nanosecs, "Show times in nanosecs"),
        OPT_CALLBACK(0, "time-quantum", &symbol_conf.time_quantum, "time (ms|us|ns|s)",
                     "Set time quantum for time sort key (default 100ms)",
                     parse_time_quantum),
        OPTS_EVSWITCH(&report.evswitch),
        OPT_BOOLEAN(0, "total-cycles", &report.total_cycles_mode,
                    "Sort all blocks by 'Sampled Cycles%'"),
        OPT_END()
        };
        struct perf_data data = {
                .mode  = PERF_DATA_MODE_READ,
        };
        int ret = hists__init();
        char sort_tmp[128];

        if (ret < 0)
                return ret;

        ret = perf_config(report__config, &report);
        if (ret)
                return ret;

        argc = parse_options(argc, argv, options, report_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(report_usage, options);

                report.symbol_filter_str = argv[0];
        }

        if (annotate_check_args(&report.annotation_opts) < 0)
                return -EINVAL;

        if (report.mmaps_mode)
                report.tasks_mode = true;

        if (dump_trace)
                report.tool.ordered_events = false;

        if (quiet)
                perf_quiet_option();

        if (symbol_conf.vmlinux_name &&
            access(symbol_conf.vmlinux_name, R_OK)) {
                pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name);
                return -EINVAL;
        }
        if (symbol_conf.kallsyms_name &&
            access(symbol_conf.kallsyms_name, R_OK)) {
                pr_err("Invalid file: %s\n", symbol_conf.kallsyms_name);
                return -EINVAL;
        }

        if (report.inverted_callchain)
                callchain_param.order = ORDER_CALLER;
        if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
                callchain_param.order = ORDER_CALLER;

        if ((itrace_synth_opts.callchain || itrace_synth_opts.add_callchain) &&
            (int)itrace_synth_opts.callchain_sz > report.max_stack)
                report.max_stack = itrace_synth_opts.callchain_sz;

        if (!input_name || !strlen(input_name)) {
                if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
                        input_name = "-";
                else
                        input_name = "perf.data";
        }

        data.path  = input_name;
        data.force = symbol_conf.force;

repeat:
        session = perf_session__new(&data, false, &report.tool);
        if (IS_ERR(session))
                return PTR_ERR(session);

        ret = evswitch__init(&report.evswitch, session->evlist, stderr);
        if (ret)
                return ret;

        if (zstd_init(&(session->zstd_data), 0) < 0)
                pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");

        if (report.queue_size) {
                ordered_events__set_alloc_size(&session->ordered_events,
                                               report.queue_size);
        }

        session->itrace_synth_opts = &itrace_synth_opts;

        report.session = session;

        has_br_stack = perf_header__has_feat(&session->header,
                                             HEADER_BRANCH_STACK);
        if (evlist__combined_sample_type(session->evlist) & PERF_SAMPLE_STACK_USER)
                has_br_stack = false;

        setup_forced_leader(&report, session->evlist);

        if (symbol_conf.group_sort_idx && !session->evlist->nr_groups) {
                parse_options_usage(NULL, options, "group-sort-idx", 0);
                ret = -EINVAL;
                goto error;
        }

        if (itrace_synth_opts.last_branch || itrace_synth_opts.add_last_branch)
                has_br_stack = true;

        if (has_br_stack && branch_call_mode)
                symbol_conf.show_branchflag_count = true;

        memset(&report.brtype_stat, 0, sizeof(struct branch_type_stat));

        /*
         * Branch mode is a tristate:
         * -1 means default, so decide based on the file having branch data.
         * 0/1 means the user chose a mode.
         */
        if (((branch_mode == -1 && has_br_stack) || branch_mode == 1) &&
            !branch_call_mode) {
                sort__mode = SORT_MODE__BRANCH;
                symbol_conf.cumulate_callchain = false;
        }
        if (branch_call_mode) {
                callchain_param.key = CCKEY_ADDRESS;
                callchain_param.branch_callstack = true;
                symbol_conf.use_callchain = true;
                callchain_register_param(&callchain_param);
                if (sort_order == NULL)
                        sort_order = "srcline,symbol,dso";
        }

        if (report.mem_mode) {
                if (sort__mode == SORT_MODE__BRANCH) {
                        pr_err("branch and mem mode incompatible\n");
                        goto error;
                }
                sort__mode = SORT_MODE__MEMORY;
                symbol_conf.cumulate_callchain = false;
        }

        if (symbol_conf.report_hierarchy) {
                /* disable incompatible options */
                symbol_conf.cumulate_callchain = false;

                if (field_order) {
                        pr_err("Error: --hierarchy and --fields options cannot be used together\n");
                        parse_options_usage(report_usage, options, "F", 1);
                        parse_options_usage(NULL, options, "hierarchy", 0);
                        goto error;
                }

                perf_hpp_list.need_collapse = true;
        }

        if (report.use_stdio)
                use_browser = 0;
        else if (report.use_tui)
                use_browser = 1;
        else if (report.use_gtk)
                use_browser = 2;

        /* Force tty output for header output and per-thread stat. */
        if (report.header || report.header_only || report.show_threads)
                use_browser = 0;
        if (report.header || report.header_only)
                report.tool.show_feat_hdr = SHOW_FEAT_HEADER;
        if (report.show_full_info)
                report.tool.show_feat_hdr = SHOW_FEAT_HEADER_FULL_INFO;
        if (report.stats_mode || report.tasks_mode)
                use_browser = 0;
        if (report.stats_mode && report.tasks_mode) {
                pr_err("Error: --tasks and --mmaps can't be used together with --stats\n");
                goto error;
        }

        if (report.total_cycles_mode) {
                if (sort__mode != SORT_MODE__BRANCH)
                        report.total_cycles_mode = false;
                else
                        sort_order = NULL;
        }

        if (strcmp(input_name, "-") != 0)
                setup_browser(true);
        else
                use_browser = 0;

        if (sort_order && strstr(sort_order, "ipc")) {
                parse_options_usage(report_usage, options, "s", 1);
                goto error;
        }

        if (sort_order && strstr(sort_order, "symbol")) {
                if (sort__mode == SORT_MODE__BRANCH) {
                        snprintf(sort_tmp, sizeof(sort_tmp), "%s,%s",
                                 sort_order, "ipc_lbr");
                        report.symbol_ipc = true;
                } else {
                        snprintf(sort_tmp, sizeof(sort_tmp), "%s,%s",
                                 sort_order, "ipc_null");
                }

                sort_order = sort_tmp;
        }

        if ((last_key != K_SWITCH_INPUT_DATA && last_key != K_RELOAD) &&
            (setup_sorting(session->evlist) < 0)) {
                if (sort_order)
                        parse_options_usage(report_usage, options, "s", 1);
                if (field_order)
                        parse_options_usage(sort_order ? NULL : report_usage,
                                            options, "F", 1);
                goto error;
        }

        if ((report.header || report.header_only) && !quiet) {
                perf_session__fprintf_info(session, stdout,
                                           report.show_full_info);
                if (report.header_only) {
                        ret = 0;
                        goto error;
                }
        } else if (use_browser == 0 && !quiet &&
                   !report.stats_mode && !report.tasks_mode) {
                fputs("# To display the perf.data header info, please use --header/--header-only options.\n#\n",
                      stdout);
        }

        /*
         * Only in the TUI browser we are doing integrated annotation,
         * so don't allocate extra space that won't be used in the stdio
         * implementation.
         */
        if (ui__has_annotation() || report.symbol_ipc ||
            report.total_cycles_mode) {
                ret = symbol__annotation_init();
                if (ret < 0)
                        goto error;
                /*
                 * For searching by name on the "Browse map details".
                 * providing it only in verbose mode not to bloat too
                 * much struct symbol.
                 */
                if (verbose > 0) {
                        /*
                         * XXX: Need to provide a less kludgy way to ask for
                         * more space per symbol, the u32 is for the index on
                         * the ui browser.
                         * See symbol__browser_index.
                         */
                        symbol_conf.priv_size += sizeof(u32);
                        symbol_conf.sort_by_name = true;
                }
                annotation_config__init(&report.annotation_opts);
        }

        if (symbol__init(&session->header.env) < 0)
                goto error;

        if (report.time_str) {
                ret = perf_time__parse_for_ranges(report.time_str, session,
                                                  &report.ptime_range,
                                                  &report.range_size,
                                                  &report.range_num);
                if (ret < 0)
                        goto error;

                itrace_synth_opts__set_time_range(&itrace_synth_opts,
                                                  report.ptime_range,
                                                  report.range_num);
        }

        if (session->tevent.pevent &&
            tep_set_function_resolver(session->tevent.pevent,
                                      machine__resolve_kernel_addr,
                                      &session->machines.host) < 0) {
                pr_err("%s: failed to set libtraceevent function resolver\n",
                       __func__);
                return -1;
        }

        sort__setup_elide(stdout);

        ret = __cmd_report(&report);
        if (ret == K_SWITCH_INPUT_DATA || ret == K_RELOAD) {
                perf_session__delete(session);
                last_key = K_SWITCH_INPUT_DATA;
                goto repeat;
        } else
                ret = 0;

error:
        if (report.ptime_range) {
                itrace_synth_opts__clear_time_range(&itrace_synth_opts);
                zfree(&report.ptime_range);
        }

        if (report.block_reports) {
                block_info__free_report(report.block_reports,
                                        report.nr_block_reports);
                report.block_reports = NULL;
        }

        zstd_fini(&(session->zstd_data));
        perf_session__delete(session);
        return ret;
}