// SPDX-License-Identifier: GPL-2.0
#include "../browser.h"
#include "../helpline.h"
#include "../ui.h"
#include "../util.h"
#include "../../util/annotate.h"
#include "../../util/hist.h"
#include "../../util/sort.h"
#include "../../util/map.h"
#include "../../util/symbol.h"
#include "../../util/evsel.h"
#include "../../util/evlist.h"
#include <inttypes.h>
#include <pthread.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/zalloc.h>
#include <sys/ttydefaults.h>
#include <asm/bug.h>

struct disasm_line_samples {
        double                percent;
        struct sym_hist_entry he;
};

struct arch;

struct annotate_browser {
        struct ui_browser           b;
        struct rb_root              entries;
        struct rb_node             *curr_hot;
        struct annotation_line     *selection;
        struct arch                *arch;
        struct annotation_options  *opts;
        bool                        searching_backwards;
        char                        search_bf[128];
};

static inline struct annotation *browser__annotation(struct ui_browser *browser)
{
        struct map_symbol *ms = browser->priv;
        return symbol__annotation(ms->sym);
}

static bool disasm_line__filter(struct ui_browser *browser, void *entry)
{
        struct annotation *notes = browser__annotation(browser);
        struct annotation_line *al = list_entry(entry, struct annotation_line, node);
        return annotation_line__filter(al, notes);
}

static int ui_browser__jumps_percent_color(struct ui_browser *browser, int nr, bool current)
{
        struct annotation *notes = browser__annotation(browser);

        if (current && (!browser->use_navkeypressed || browser->navkeypressed))
                return HE_COLORSET_SELECTED;
        if (nr == notes->max_jump_sources)
                return HE_COLORSET_TOP;
        if (nr > 1)
                return HE_COLORSET_MEDIUM;
        return HE_COLORSET_NORMAL;
}

static int ui_browser__set_jumps_percent_color(void *browser, int nr, bool current)
{
         int color = ui_browser__jumps_percent_color(browser, nr, current);
         return ui_browser__set_color(browser, color);
}

static int annotate_browser__set_color(void *browser, int color)
{
        return ui_browser__set_color(browser, color);
}

static void annotate_browser__write_graph(void *browser, int graph)
{
        ui_browser__write_graph(browser, graph);
}

static void annotate_browser__set_percent_color(void *browser, double percent, bool current)
{
        ui_browser__set_percent_color(browser, percent, current);
}

static void annotate_browser__printf(void *browser, const char *fmt, ...)
{
        va_list args;

        va_start(args, fmt);
        ui_browser__vprintf(browser, fmt, args);
        va_end(args);
}

static void annotate_browser__write(struct ui_browser *browser, void *entry, int row)
{
        struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
        struct annotation *notes = browser__annotation(browser);
        struct annotation_line *al = list_entry(entry, struct annotation_line, node);
        const bool is_current_entry = ui_browser__is_current_entry(browser, row);
        struct annotation_write_ops ops = {
                .first_line              = row == 0,
                .current_entry           = is_current_entry,
                .change_color            = (!notes->options->hide_src_code &&
                                            (!is_current_entry ||
                                             (browser->use_navkeypressed &&
                                              !browser->navkeypressed))),
                .width                   = browser->width,
                .obj                     = browser,
                .set_color               = annotate_browser__set_color,
                .set_percent_color       = annotate_browser__set_percent_color,
                .set_jumps_percent_color = ui_browser__set_jumps_percent_color,
                .printf                  = annotate_browser__printf,
                .write_graph             = annotate_browser__write_graph,
        };

        /* The scroll bar isn't being used */
        if (!browser->navkeypressed)
                ops.width += 1;

        annotation_line__write(al, notes, &ops, ab->opts);

        if (ops.current_entry)
                ab->selection = al;
}

static bool is_fused(struct annotate_browser *ab, struct disasm_line *cursor)
{
        struct disasm_line *pos = list_prev_entry(cursor, al.node);
        const char *name;

        if (!pos)
                return false;

        if (ins__is_lock(&pos->ins))
                name = pos->ops.locked.ins.name;
        else
                name = pos->ins.name;

        if (!name || !cursor->ins.name)
                return false;

        return ins__is_fused(ab->arch, name, cursor->ins.name);
}

static void annotate_browser__draw_current_jump(struct ui_browser *browser)
{
        struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
        struct disasm_line *cursor = disasm_line(ab->selection);
        struct annotation_line *target;
        unsigned int from, to;
        struct map_symbol *ms = ab->b.priv;
        struct symbol *sym = ms->sym;
        struct annotation *notes = symbol__annotation(sym);
        u8 pcnt_width = annotation__pcnt_width(notes);
        int width;

        /* PLT symbols contain external offsets */
        if (strstr(sym->name, "@plt"))
                return;

        if (!disasm_line__is_valid_local_jump(cursor, sym))
                return;

        /*
         * This first was seen with a gcc function, _cpp_lex_token, that
         * has the usual jumps:
         *
         *  │1159e6c: ↓ jne    115aa32 <_cpp_lex_token@@Base+0xf92>
         *
         * I.e. jumps to a label inside that function (_cpp_lex_token), and
         * those works, but also this kind:
         *
         *  │1159e8b: ↓ jne    c469be <cpp_named_operator2name@@Base+0xa72>
         *
         *  I.e. jumps to another function, outside _cpp_lex_token, which
         *  are not being correctly handled generating as a side effect references
         *  to ab->offset[] entries that are set to NULL, so to make this code
         *  more robust, check that here.
         *
         *  A proper fix for will be put in place, looking at the function
         *  name right after the '<' token and probably treating this like a
         *  'call' instruction.
         */
        target = notes->offsets[cursor->ops.target.offset];
        if (target == NULL) {
                ui_helpline__printf("WARN: jump target inconsistency, press 'o', notes->offsets[%#x] = NULL\n",
                                    cursor->ops.target.offset);
                return;
        }

        if (notes->options->hide_src_code) {
                from = cursor->al.idx_asm;
                to = target->idx_asm;
        } else {
                from = (u64)cursor->al.idx;
                to = (u64)target->idx;
        }

        width = annotation__cycles_width(notes);

        ui_browser__set_color(browser, HE_COLORSET_JUMP_ARROWS);
        __ui_browser__line_arrow(browser,
                                 pcnt_width + 2 + notes->widths.addr + width,
                                 from, to);

        if (is_fused(ab, cursor)) {
                ui_browser__mark_fused(browser,
                                       pcnt_width + 3 + notes->widths.addr + width,
                                       from - 1,
                                       to > from ? true : false);
        }
}

static unsigned int annotate_browser__refresh(struct ui_browser *browser)
{
        struct annotation *notes = browser__annotation(browser);
        int ret = ui_browser__list_head_refresh(browser);
        int pcnt_width = annotation__pcnt_width(notes);

        if (notes->options->jump_arrows)
                annotate_browser__draw_current_jump(browser);

        ui_browser__set_color(browser, HE_COLORSET_NORMAL);
        __ui_browser__vline(browser, pcnt_width, 0, browser->rows - 1);
        return ret;
}

static double disasm__cmp(struct annotation_line *a, struct annotation_line *b,
                                                  int percent_type)
{
        int i;

        for (i = 0; i < a->data_nr; i++) {
                if (a->data[i].percent[percent_type] == b->data[i].percent[percent_type])
                        continue;
                return a->data[i].percent[percent_type] -
                           b->data[i].percent[percent_type];
        }
        return 0;
}

static void disasm_rb_tree__insert(struct annotate_browser *browser,
                                struct annotation_line *al)
{
        struct rb_root *root = &browser->entries;
        struct rb_node **p = &root->rb_node;
        struct rb_node *parent = NULL;
        struct annotation_line *l;

        while (*p != NULL) {
                parent = *p;
                l = rb_entry(parent, struct annotation_line, rb_node);

                if (disasm__cmp(al, l, browser->opts->percent_type) < 0)
                        p = &(*p)->rb_left;
                else
                        p = &(*p)->rb_right;
        }
        rb_link_node(&al->rb_node, parent, p);
        rb_insert_color(&al->rb_node, root);
}

static void annotate_browser__set_top(struct annotate_browser *browser,
                                      struct annotation_line *pos, u32 idx)
{
        struct annotation *notes = browser__annotation(&browser->b);
        unsigned back;

        ui_browser__refresh_dimensions(&browser->b);
        back = browser->b.height / 2;
        browser->b.top_idx = browser->b.index = idx;

        while (browser->b.top_idx != 0 && back != 0) {
                pos = list_entry(pos->node.prev, struct annotation_line, node);

                if (annotation_line__filter(pos, notes))
                        continue;

                --browser->b.top_idx;
                --back;
        }

        browser->b.top = pos;
        browser->b.navkeypressed = true;
}

static void annotate_browser__set_rb_top(struct annotate_browser *browser,
                                         struct rb_node *nd)
{
        struct annotation *notes = browser__annotation(&browser->b);
        struct annotation_line * pos = rb_entry(nd, struct annotation_line, rb_node);
        u32 idx = pos->idx;

        if (notes->options->hide_src_code)
                idx = pos->idx_asm;
        annotate_browser__set_top(browser, pos, idx);
        browser->curr_hot = nd;
}

static void annotate_browser__calc_percent(struct annotate_browser *browser,
                                           struct perf_evsel *evsel)
{
        struct map_symbol *ms = browser->b.priv;
        struct symbol *sym = ms->sym;
        struct annotation *notes = symbol__annotation(sym);
        struct disasm_line *pos;

        browser->entries = RB_ROOT;

        pthread_mutex_lock(&notes->lock);

        symbol__calc_percent(sym, evsel);

        list_for_each_entry(pos, &notes->src->source, al.node) {
                double max_percent = 0.0;
                int i;

                if (pos->al.offset == -1) {
                        RB_CLEAR_NODE(&pos->al.rb_node);
                        continue;
                }

                for (i = 0; i < pos->al.data_nr; i++) {
                        double percent;

                        percent = annotation_data__percent(&pos->al.data[i],
                                                           browser->opts->percent_type);

                        if (max_percent < percent)
                                max_percent = percent;
                }

                if (max_percent < 0.01 && pos->al.ipc == 0) {
                        RB_CLEAR_NODE(&pos->al.rb_node);
                        continue;
                }
                disasm_rb_tree__insert(browser, &pos->al);
        }
        pthread_mutex_unlock(&notes->lock);

        browser->curr_hot = rb_last(&browser->entries);
}

static bool annotate_browser__toggle_source(struct annotate_browser *browser)
{
        struct annotation *notes = browser__annotation(&browser->b);
        struct annotation_line *al;
        off_t offset = browser->b.index - browser->b.top_idx;

        browser->b.seek(&browser->b, offset, SEEK_CUR);
        al = list_entry(browser->b.top, struct annotation_line, node);

        if (notes->options->hide_src_code) {
                if (al->idx_asm < offset)
                        offset = al->idx;

                browser->b.nr_entries = notes->nr_entries;
                notes->options->hide_src_code = false;
                browser->b.seek(&browser->b, -offset, SEEK_CUR);
                browser->b.top_idx = al->idx - offset;
                browser->b.index = al->idx;
        } else {
                if (al->idx_asm < 0) {
                        ui_helpline__puts("Only available for assembly lines.");
                        browser->b.seek(&browser->b, -offset, SEEK_CUR);
                        return false;
                }

                if (al->idx_asm < offset)
                        offset = al->idx_asm;

                browser->b.nr_entries = notes->nr_asm_entries;
                notes->options->hide_src_code = true;
                browser->b.seek(&browser->b, -offset, SEEK_CUR);
                browser->b.top_idx = al->idx_asm - offset;
                browser->b.index = al->idx_asm;
        }

        return true;
}

static void ui_browser__init_asm_mode(struct ui_browser *browser)
{
        struct annotation *notes = browser__annotation(browser);
        ui_browser__reset_index(browser);
        browser->nr_entries = notes->nr_asm_entries;
}

#define SYM_TITLE_MAX_SIZE (PATH_MAX + 64)

static int sym_title(struct symbol *sym, struct map *map, char *title,
                     size_t sz, int percent_type)
{
        return snprintf(title, sz, "%s  %s [Percent: %s]", sym->name, map->dso->long_name,
                        percent_type_str(percent_type));
}

/*
 * This can be called from external jumps, i.e. jumps from one functon
 * to another, like from the kernel's entry_SYSCALL_64 function to the
 * swapgs_restore_regs_and_return_to_usermode() function.
 *
 * So all we check here is that dl->ops.target.sym is set, if it is, just
 * go to that function and when exiting from its disassembly, come back
 * to the calling function.
 */
static bool annotate_browser__callq(struct annotate_browser *browser,
                                    struct perf_evsel *evsel,
                                    struct hist_browser_timer *hbt)
{
        struct map_symbol *ms = browser->b.priv;
        struct disasm_line *dl = disasm_line(browser->selection);
        struct annotation *notes;
        char title[SYM_TITLE_MAX_SIZE];

        if (!dl->ops.target.sym) {
                ui_helpline__puts("The called function was not found.");
                return true;
        }

        notes = symbol__annotation(dl->ops.target.sym);
        pthread_mutex_lock(&notes->lock);

        if (!symbol__hists(dl->ops.target.sym, evsel->evlist->nr_entries)) {
                pthread_mutex_unlock(&notes->lock);
                ui__warning("Not enough memory for annotating '%s' symbol!\n",
                            dl->ops.target.sym->name);
                return true;
        }

        pthread_mutex_unlock(&notes->lock);
        symbol__tui_annotate(dl->ops.target.sym, ms->map, evsel, hbt, browser->opts);
        sym_title(ms->sym, ms->map, title, sizeof(title), browser->opts->percent_type);
        ui_browser__show_title(&browser->b, title);
        return true;
}

static
struct disasm_line *annotate_browser__find_offset(struct annotate_browser *browser,
                                          s64 offset, s64 *idx)
{
        struct annotation *notes = browser__annotation(&browser->b);
        struct disasm_line *pos;

        *idx = 0;
        list_for_each_entry(pos, &notes->src->source, al.node) {
                if (pos->al.offset == offset)
                        return pos;
                if (!annotation_line__filter(&pos->al, notes))
                        ++*idx;
        }

        return NULL;
}

static bool annotate_browser__jump(struct annotate_browser *browser,
                                   struct perf_evsel *evsel,
                                   struct hist_browser_timer *hbt)
{
        struct disasm_line *dl = disasm_line(browser->selection);
        u64 offset;
        s64 idx;

        if (!ins__is_jump(&dl->ins))
                return false;

        if (dl->ops.target.outside) {
                annotate_browser__callq(browser, evsel, hbt);
                return true;
        }

        offset = dl->ops.target.offset;
        dl = annotate_browser__find_offset(browser, offset, &idx);
        if (dl == NULL) {
                ui_helpline__printf("Invalid jump offset: %" PRIx64, offset);
                return true;
        }

        annotate_browser__set_top(browser, &dl->al, idx);

        return true;
}

static
struct annotation_line *annotate_browser__find_string(struct annotate_browser *browser,
                                          char *s, s64 *idx)
{
        struct annotation *notes = browser__annotation(&browser->b);
        struct annotation_line *al = browser->selection;

        *idx = browser->b.index;
        list_for_each_entry_continue(al, &notes->src->source, node) {
                if (annotation_line__filter(al, notes))
                        continue;

                ++*idx;

                if (al->line && strstr(al->line, s) != NULL)
                        return al;
        }

        return NULL;
}

static bool __annotate_browser__search(struct annotate_browser *browser)
{
        struct annotation_line *al;
        s64 idx;

        al = annotate_browser__find_string(browser, browser->search_bf, &idx);
        if (al == NULL) {
                ui_helpline__puts("String not found!");
                return false;
        }

        annotate_browser__set_top(browser, al, idx);
        browser->searching_backwards = false;
        return true;
}

static
struct annotation_line *annotate_browser__find_string_reverse(struct annotate_browser *browser,
                                                  char *s, s64 *idx)
{
        struct annotation *notes = browser__annotation(&browser->b);
        struct annotation_line *al = browser->selection;

        *idx = browser->b.index;
        list_for_each_entry_continue_reverse(al, &notes->src->source, node) {
                if (annotation_line__filter(al, notes))
                        continue;

                --*idx;

                if (al->line && strstr(al->line, s) != NULL)
                        return al;
        }

        return NULL;
}

static bool __annotate_browser__search_reverse(struct annotate_browser *browser)
{
        struct annotation_line *al;
        s64 idx;

        al = annotate_browser__find_string_reverse(browser, browser->search_bf, &idx);
        if (al == NULL) {
                ui_helpline__puts("String not found!");
                return false;
        }

        annotate_browser__set_top(browser, al, idx);
        browser->searching_backwards = true;
        return true;
}

static bool annotate_browser__search_window(struct annotate_browser *browser,
                                            int delay_secs)
{
        if (ui_browser__input_window("Search", "String: ", browser->search_bf,
                                     "ENTER: OK, ESC: Cancel",
                                     delay_secs * 2) != K_ENTER ||
            !*browser->search_bf)
                return false;

        return true;
}

static bool annotate_browser__search(struct annotate_browser *browser, int delay_secs)
{
        if (annotate_browser__search_window(browser, delay_secs))
                return __annotate_browser__search(browser);

        return false;
}

static bool annotate_browser__continue_search(struct annotate_browser *browser,
                                              int delay_secs)
{
        if (!*browser->search_bf)
                return annotate_browser__search(browser, delay_secs);

        return __annotate_browser__search(browser);
}

static bool annotate_browser__search_reverse(struct annotate_browser *browser,
                                           int delay_secs)
{
        if (annotate_browser__search_window(browser, delay_secs))
                return __annotate_browser__search_reverse(browser);

        return false;
}

static
bool annotate_browser__continue_search_reverse(struct annotate_browser *browser,
                                               int delay_secs)
{
        if (!*browser->search_bf)
                return annotate_browser__search_reverse(browser, delay_secs);

        return __annotate_browser__search_reverse(browser);
}

static int annotate_browser__show(struct ui_browser *browser, char *title, const char *help)
{
        struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
        struct map_symbol *ms = browser->priv;
        struct symbol *sym = ms->sym;
        char symbol_dso[SYM_TITLE_MAX_SIZE];

        if (ui_browser__show(browser, title, help) < 0)
                return -1;

        sym_title(sym, ms->map, symbol_dso, sizeof(symbol_dso), ab->opts->percent_type);

        ui_browser__gotorc_title(browser, 0, 0);
        ui_browser__set_color(browser, HE_COLORSET_ROOT);
        ui_browser__write_nstring(browser, symbol_dso, browser->width + 1);
        return 0;
}

static void
switch_percent_type(struct annotation_options *opts, bool base)
{
        switch (opts->percent_type) {
        case PERCENT_HITS_LOCAL:
                if (base)
                        opts->percent_type = PERCENT_PERIOD_LOCAL;
                else
                        opts->percent_type = PERCENT_HITS_GLOBAL;
                break;
        case PERCENT_HITS_GLOBAL:
                if (base)
                        opts->percent_type = PERCENT_PERIOD_GLOBAL;
                else
                        opts->percent_type = PERCENT_HITS_LOCAL;
                break;
        case PERCENT_PERIOD_LOCAL:
                if (base)
                        opts->percent_type = PERCENT_HITS_LOCAL;
                else
                        opts->percent_type = PERCENT_PERIOD_GLOBAL;
                break;
        case PERCENT_PERIOD_GLOBAL:
                if (base)
                        opts->percent_type = PERCENT_HITS_GLOBAL;
                else
                        opts->percent_type = PERCENT_PERIOD_LOCAL;
                break;
        default:
                WARN_ON(1);
        }
}

static int annotate_browser__run(struct annotate_browser *browser,
                                 struct perf_evsel *evsel,
                                 struct hist_browser_timer *hbt)
{
        struct rb_node *nd = NULL;
        struct hists *hists = evsel__hists(evsel);
        struct map_symbol *ms = browser->b.priv;
        struct symbol *sym = ms->sym;
        struct annotation *notes = symbol__annotation(ms->sym);
        const char *help = "Press 'h' for help on key bindings";
        int delay_secs = hbt ? hbt->refresh : 0;
        char title[256];
        int key;

        hists__scnprintf_title(hists, title, sizeof(title));
        if (annotate_browser__show(&browser->b, title, help) < 0)
                return -1;

        annotate_browser__calc_percent(browser, evsel);

        if (browser->curr_hot) {
                annotate_browser__set_rb_top(browser, browser->curr_hot);
                browser->b.navkeypressed = false;
        }

        nd = browser->curr_hot;

        while (1) {
                key = ui_browser__run(&browser->b, delay_secs);

                if (delay_secs != 0) {
                        annotate_browser__calc_percent(browser, evsel);
                        /*
                         * Current line focus got out of the list of most active
                         * lines, NULL it so that if TAB|UNTAB is pressed, we
                         * move to curr_hot (current hottest line).
                         */
                        if (nd != NULL && RB_EMPTY_NODE(nd))
                                nd = NULL;
                }

                switch (key) {
                case K_TIMER:
                        if (hbt)
                                hbt->timer(hbt->arg);

                        if (delay_secs != 0) {
                                symbol__annotate_decay_histogram(sym, evsel->idx);
                                hists__scnprintf_title(hists, title, sizeof(title));
                                annotate_browser__show(&browser->b, title, help);
                        }
                        continue;
                case K_TAB:
                        if (nd != NULL) {
                                nd = rb_prev(nd);
                                if (nd == NULL)
                                        nd = rb_last(&browser->entries);
                        } else
                                nd = browser->curr_hot;
                        break;
                case K_UNTAB:
                        if (nd != NULL) {
                                nd = rb_next(nd);
                                if (nd == NULL)
                                        nd = rb_first(&browser->entries);
                        } else
                                nd = browser->curr_hot;
                        break;
                case K_F1:
                case 'h':
                        ui_browser__help_window(&browser->b,
                "UP/DOWN/PGUP\n"
                "PGDN/SPACE    Navigate\n"
                "q/ESC/CTRL+C  Exit\n\n"
                "ENTER         Go to target\n"
                "ESC           Exit\n"
                "H             Go to hottest instruction\n"
                "TAB/shift+TAB Cycle thru hottest instructions\n"
                "j             Toggle showing jump to target arrows\n"
                "J             Toggle showing number of jump sources on targets\n"
                "n             Search next string\n"
                "o             Toggle disassembler output/simplified view\n"
                "O             Bump offset level (jump targets -> +call -> all -> cycle thru)\n"
                "s             Toggle source code view\n"
                "t             Circulate percent, total period, samples view\n"
                "c             Show min/max cycle\n"
                "/             Search string\n"
                "k             Toggle line numbers\n"
                "P             Print to [symbol_name].annotation file.\n"
                "r             Run available scripts\n"
                "p             Toggle percent type [local/global]\n"
                "b             Toggle percent base [period/hits]\n"
                "?             Search string backwards\n");
                        continue;
                case 'r':
                        {
                                script_browse(NULL, NULL);
                                continue;
                        }
                case 'k':
                        notes->options->show_linenr = !notes->options->show_linenr;
                        break;
                case 'H':
                        nd = browser->curr_hot;
                        break;
                case 's':
                        if (annotate_browser__toggle_source(browser))
                                ui_helpline__puts(help);
                        continue;
                case 'o':
                        notes->options->use_offset = !notes->options->use_offset;
                        annotation__update_column_widths(notes);
                        continue;
                case 'O':
                        if (++notes->options->offset_level > ANNOTATION__MAX_OFFSET_LEVEL)
                                notes->options->offset_level = ANNOTATION__MIN_OFFSET_LEVEL;
                        continue;
                case 'j':
                        notes->options->jump_arrows = !notes->options->jump_arrows;
                        continue;
                case 'J':
                        notes->options->show_nr_jumps = !notes->options->show_nr_jumps;
                        annotation__update_column_widths(notes);
                        continue;
                case '/':
                        if (annotate_browser__search(browser, delay_secs)) {
show_help:
                                ui_helpline__puts(help);
                        }
                        continue;
                case 'n':
                        if (browser->searching_backwards ?
                            annotate_browser__continue_search_reverse(browser, delay_secs) :
                            annotate_browser__continue_search(browser, delay_secs))
                                goto show_help;
                        continue;
                case '?':
                        if (annotate_browser__search_reverse(browser, delay_secs))
                                goto show_help;
                        continue;
                case 'D': {
                        static int seq;
                        ui_helpline__pop();
                        ui_helpline__fpush("%d: nr_ent=%d, height=%d, idx=%d, top_idx=%d, nr_asm_entries=%d",
                                           seq++, browser->b.nr_entries,
                                           browser->b.height,
                                           browser->b.index,
                                           browser->b.top_idx,
                                           notes->nr_asm_entries);
                }
                        continue;
                case K_ENTER:
                case K_RIGHT:
                {
                        struct disasm_line *dl = disasm_line(browser->selection);

                        if (browser->selection == NULL)
                                ui_helpline__puts("Huh? No selection. Report to linux-kernel@vger.kernel.org");
                        else if (browser->selection->offset == -1)
                                ui_helpline__puts("Actions are only available for assembly lines.");
                        else if (!dl->ins.ops)
                                goto show_sup_ins;
                        else if (ins__is_ret(&dl->ins))
                                goto out;
                        else if (!(annotate_browser__jump(browser, evsel, hbt) ||
                                     annotate_browser__callq(browser, evsel, hbt))) {
show_sup_ins:
                                ui_helpline__puts("Actions are only available for function call/return & jump/branch instructions.");
                        }
                        continue;
                }
                case 'P':
                        map_symbol__annotation_dump(ms, evsel, browser->opts);
                        continue;
                case 't':
                        if (notes->options->show_total_period) {
                                notes->options->show_total_period = false;
                                notes->options->show_nr_samples = true;
                        } else if (notes->options->show_nr_samples)
                                notes->options->show_nr_samples = false;
                        else
                                notes->options->show_total_period = true;
                        annotation__update_column_widths(notes);
                        continue;
                case 'c':
                        if (notes->options->show_minmax_cycle)
                                notes->options->show_minmax_cycle = false;
                        else
                                notes->options->show_minmax_cycle = true;
                        annotation__update_column_widths(notes);
                        continue;
                case 'p':
                case 'b':
                        switch_percent_type(browser->opts, key == 'b');
                        hists__scnprintf_title(hists, title, sizeof(title));
                        annotate_browser__show(&browser->b, title, help);
                        continue;
                case K_LEFT:
                case K_ESC:
                case 'q':
                case CTRL('c'):
                        goto out;
                default:
                        continue;
                }

                if (nd != NULL)
                        annotate_browser__set_rb_top(browser, nd);
        }
out:
        ui_browser__hide(&browser->b);
        return key;
}

int map_symbol__tui_annotate(struct map_symbol *ms, struct perf_evsel *evsel,
                             struct hist_browser_timer *hbt,
                             struct annotation_options *opts)
{
        return symbol__tui_annotate(ms->sym, ms->map, evsel, hbt, opts);
}

int hist_entry__tui_annotate(struct hist_entry *he, struct perf_evsel *evsel,
                             struct hist_browser_timer *hbt,
                             struct annotation_options *opts)
{
        /* reset abort key so that it can get Ctrl-C as a key */
        SLang_reset_tty();
        SLang_init_tty(0, 0, 0);

        return map_symbol__tui_annotate(&he->ms, evsel, hbt, opts);
}

int symbol__tui_annotate(struct symbol *sym, struct map *map,
                         struct perf_evsel *evsel,
                         struct hist_browser_timer *hbt,
                         struct annotation_options *opts)
{
        struct annotation *notes = symbol__annotation(sym);
        struct map_symbol ms = {
                .map = map,
                .sym = sym,
        };
        struct annotate_browser browser = {
                .b = {
                        .refresh = annotate_browser__refresh,
                        .seek    = ui_browser__list_head_seek,
                        .write   = annotate_browser__write,
                        .filter  = disasm_line__filter,
                        .extra_title_lines = 1, /* for hists__scnprintf_title() */
                        .priv    = &ms,
                        .use_navkeypressed = true,
                },
                .opts = opts,
        };
        int ret = -1, err;

        if (sym == NULL)
                return -1;

        if (map->dso->annotate_warned)
                return -1;

        err = symbol__annotate2(sym, map, evsel, opts, &browser.arch);
        if (err) {
                char msg[BUFSIZ];
                symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
                ui__error("Couldn't annotate %s:\n%s", sym->name, msg);
                goto out_free_offsets;
        }

        ui_helpline__push("Press ESC to exit");

        browser.b.width = notes->max_line_len;
        browser.b.nr_entries = notes->nr_entries;
        browser.b.entries = &notes->src->source,
        browser.b.width += 18; /* Percentage */

        if (notes->options->hide_src_code)
                ui_browser__init_asm_mode(&browser.b);

        ret = annotate_browser__run(&browser, evsel, hbt);

        annotated_source__purge(notes->src);

out_free_offsets:
        zfree(&notes->offsets);
        return ret;
}